Knife - Essential Tool for Camping, Outdoor Adventure and collection
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ExtremaRatio - Aero FX - Black Nitrogen & Black Lime Aluminium - fixed-blade knife
The lines are stripped down to the essentials; the profile is clean and continuous. This isn’t an aesthetic choice, but the result of a function-oriented design. Every element exists for a specific reason; everything else has been eliminated.
The skeletonized full-tang construction and 4.8 mm blade thickness reflect a different approach: lightness where needed, strength where it counts. The 80 mm blade and 191 mm overall length define a compact yet uncompromising tool.
The AERO FX is built around materials selected to ensure durability, reliability, and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade with a MIL-C-13924 burnished finish, designed to offer corrosion resistance, good edge retention, and ease of resharpening.
The carrying system consists of a dual-configuration Kydex sheath: an ultra-flat, slim solution for discreet carry and an additional interface to expand attachment options. The configuration can be adapted using the Malice clip or paracord, both of which are included.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Full tang, Nitrogen-alloyed steel
Blade Finish: MIL-C-13924 burnished
Handle: Anodized Anticorodal aluminum
Blade Length: 80mm.
Blade thickness: 4.8 mm.
Overall length: 191 mm.
Weight: 117 g.
Sheath: thermoformed Kydex, can be worn around the neck or on a belt using the included Malice clips
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AEFX-BLIM -
ExtremaRatio - 185° RAO knife - PRIVATE COLLECTION - Knife
PREVIOUSLY PURCHASED KNIFE, PRIVATE COLLECTION
* Origin: acquired from private owner - SERIAL CK0191S - produced in 2021
* Condition: overall very good condition (see photos)
* Market availability: no longer in production in this unit-marked version
* Sharpening: factory edge
* Blade marks: none
* Handle marks: none
* Box: present, slightly damaged
* Sheath: included
* Manuals, certificates and warranty: included
* Checked and certified by our internal laboratory
Folding knife made according to specifications requested by the Italian Army unit 185th RAO (Regiment for Target Acquisition) and currently in service with the same unit. The service version differs from the civilian one only by the complete absence of writings or logos on the blade.
HISTORICAL NOTES ON THE UNIT:
The 185th RAO of the "Folgore" is a unit with ancient traditions, yet relatively new in its current form. It was established on 3 April 2000 following the reorganization of the 185th Paratroopers Artillery Regiment. Based in Livorno, it is an atypical artillery unit currently included within the Special Forces framework.
Composed entirely of volunteer personnel, the 185th RAO selects its members through physical tests and a qualification course structured in modules of increasing difficulty. The tasks assigned to RAO operators are numerous and highly sensitive: they involve gathering information on enemy targets and relaying it to command. More generally, this can be described as reconnaissance in sensitive areas.
"It is therefore clear," the Army emphasizes, "that the activity of the acquisition operator takes place mainly in hostile territory, in small self-sufficient teams operating in isolation."
RAO paratroopers are specialists in infiltration and exfiltration techniques and are able to operate in the field for up to 8–10 days without external resupply. They know how to avoid capture, escape and evade from enemy-controlled areas and, above all, how to identify, define and assess strategically relevant targets. Since 2002, the year of its reorganization, detachments of the 185th Regiment have operated in all major operational theaters: from the Balkans to Afghanistan and Iraq. In these areas they mainly carry out medium- and long-range reconnaissance and surveillance activities within the area of responsibility of the Italian contingent.
Intended use: military/tactical
Type of production: industrial
Blade production: Italy
Blade: N690Co stainless steel 58/60HRC
Blade treatment: MIL-C 13924 black coating
Handle: anodized anticorodal aluminum 4.5mm
Blade length: 118mm
Blade thickness: 6.3mm
Closed length: 142mm
Total length: 261mm
Weight: 335g
Lock: modified front lock with additional threaded safety pin
Clip: none
Sheath: tactical nylon MOLLE-compatible, suitable for both closed and open knife use
Notes: diamond pocket sharpener includedER-RAO-BK-CP -
ExtremaRatio - BF2CT - Stone Washed N690Co - USED - PRIVATE COLLECTION - knife
KNIFE PREVIOUSLY PURCHASED AND USED, FROM A PRIVATE COLLECTION
* Origin: Purchased from a private individual, previously owned and used
* Condition: Excellent mechanical condition, good cosmetic condition (a few small marks on the aluminum handle and a few small spots of oxidation on the blade)
* Commercially available: Available on the market
* Sharpening: Professionally resharpened
* Marks on blade: Small spots of oxidation and minimal polishing of the blade’s finish due to use
* Marks on the handle: 2–3 small scuffs on the aluminum handle
* Box: Included
* Sheath: -
* Manuals, Certificates, and Warranties: Included
* Inspected and certified by our in-house laboratoryThe BF2 is a “full-size” folding knife particularly suited for professional use by military and law enforcement personnel in the field. The handle is sturdy and comfortable; the reversible, wraparound clip serves as a useful and comfortable thumb rest in the “reverse grip” position. The handle scale is solid with the characteristic recessed surfaces designed to engage the opening pins without them protruding from the knife’s closed profile. The blade, available in either a drop-point or tanto configuration, features a flat grind and, like the BF1, a particularly thick and durable tip. The blade locking mechanism is the proven LINER-LOCK, supplemented by a manually operated safety mechanism protected by a guard.
Intended Use: Tactical/Military
Production Type: Industrial
Blade: N690Co stainless steel, 58 HRC
Country of Manufacture: Italy
Handle: Anticorodal
Blade Length: 90 mm.
Blade thickness: 3 mm.
Closed length: 124 mm.
Overall length: 210 mm.
Weight: 142 g.
Closure: Liner Lock with additional safety lock operable when the knife is open
Clip: Reversible and removable stainless steel clip
Notes: Previously owned and used knife, from a private collectionER-BF2CT-SW-CP -
ExtremaRatio - Aero FX - Black Nitrogen & Black Orange Aluminium - fixed-blade knife
The lines are stripped down to the essentials; the profile is clean and continuous. This isn’t an aesthetic choice, but the result of a function-oriented design. Every element exists for a specific reason; everything else has been eliminated.
The skeletonized full-tang construction and 4.8 mm blade thickness reflect a different approach: lightness where needed, strength where it counts. The 80 mm blade and 191 mm overall length define a compact yet uncompromising tool.
The AERO FX is built around materials selected to ensure durability, reliability, and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade with a MIL-C-13924 burnished finish, designed to offer corrosion resistance, good edge retention, and ease of resharpening.
The carrying system consists of a dual-configuration Kydex sheath: an ultra-flat, slim solution for discreet carry and an additional interface to expand attachment options. The configuration can be adapted using the Malice clip or paracord, both of which are included.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Full tang, Nitrogen-alloyed steel
Blade Finish: MIL-C-13924 burnished
Handle: Anodized Anticorodal aluminum
Blade Length: 80mm.
Blade thickness: 4.8 mm.
Overall length: 191 mm.
Weight: 117 g.
Sheath: thermoformed Kydex, can be worn around the neck or on a belt using the included Malice clips
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AEFX-BKOR -
ExtremaRatio - Aero FX - Black Nitrogen & Mud Orange Aluminium - fixed-blade knife
The lines are stripped down to the essentials; the profile is clean and continuous. This isn’t an aesthetic choice, but the result of a function-oriented design. Every element exists for a specific reason; everything else has been eliminated.
The skeletonized full-tang construction and 4.8 mm blade thickness reflect a different approach: lightness where needed, strength where it counts. The 80 mm blade and 191 mm overall length define a compact yet uncompromising tool.
The AERO FX is built around materials selected to ensure durability, reliability, and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade with a MIL-C-13924 burnished finish, designed to offer corrosion resistance, good edge retention, and ease of resharpening.
The carrying system consists of a dual-configuration Kydex sheath: an ultra-flat, slim solution for discreet carry and an additional interface to expand attachment options. The configuration can be adapted using the Malice clip or paracord, both of which are included.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Full tang, Nitrogen-alloyed steel
Blade Finish: MIL-C-13924 burnished
Handle: Anodized Anticorodal aluminum
Blade Length: 80mm.
Blade thickness: 4.8 mm.
Overall length: 191 mm.
Weight: 117 g.
Sheath: thermoformed Kydex, can be worn around the neck or on a belt using the included Malice clips
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AEFX-MUD -
ExtremaRatio - Aero - Black Nitrogen & Forest Green Orange Aluminium - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-GREEN -
ExtremaRatio - Aero - Black Nitrogen & Blue Orange Aluminium - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-BLUE -
ExtremaRatio - Aero FX - Black Nitrogen & Forest Green Orange Aluminum - fixed-blade knife
The lines are stripped down to the essentials; the profile is clean and continuous. This isn’t an aesthetic choice, but the result of a function-oriented design. Every element exists for a specific reason; everything else has been eliminated.
The skeletonized full-tang construction and 4.8 mm blade thickness reflect a different approach: lightness where needed, strength where it counts. The 80 mm blade and 191 mm overall length define a compact yet uncompromising tool.
The AERO FX is built around materials selected to ensure durability, reliability, and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade with a MIL-C-13924 burnished finish, designed to offer corrosion resistance, good edge retention, and ease of resharpening.
The carrying system consists of a dual-configuration Kydex sheath: an ultra-flat, slim solution for discreet carry and an additional interface to expand attachment options. The configuration can be adapted using the Malice clip or paracord, both of which are included.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Full tang, Nitrogen-alloyed steel
Blade Finish: MIL-C-13924 burnished
Handle: Anodized Anticorodal aluminum
Blade Length: 80mm.
Blade thickness: 4.8 mm.
Overall length: 191 mm.
Weight: 117 g.
Sheath: thermoformed Kydex, can be worn around the neck or on a belt using the included Malice clips
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AEFX-GREEN -
ExtremaRatio - Aero FX - Black Nitrogen & Blue Orange Aluminum - fixed-blade knife
The lines are stripped down to the essentials; the profile is clean and continuous. This isn’t an aesthetic choice, but the result of a function-oriented design. Every element exists for a specific reason; everything else has been eliminated.
The skeletonized full-tang construction and 4.8 mm blade thickness reflect a different approach: lightness where needed, strength where it counts. The 80 mm blade and 191 mm overall length define a compact yet uncompromising tool.
The AERO FX is built around materials selected to ensure durability, reliability, and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade with a MIL-C-13924 burnished finish, designed to offer corrosion resistance, good edge retention, and ease of resharpening.
The carrying system consists of a dual-configuration Kydex sheath: an ultra-flat, slim solution for discreet carry and an additional interface to expand attachment options. The configuration can be adapted using the Malice clip or paracord, both of which are included.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Full tang, Nitrogen-alloyed steel
Blade Finish: MIL-C-13924 burnished
Handle: Anodized Anticorodal aluminum
Blade Length: 80mm.
Blade thickness: 4.8 mm.
Overall length: 191 mm.
Weight: 117 g.
Sheath: thermoformed Kydex, can be worn around the neck or on a belt using the included Malice clips
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AEFX-BLUE -
ExtremaRatio - Aero - Black Nitrogen & Mud Orange Aluminum - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-MUD -
ExtremaRatio - Aero - Black Nitrogen & Black Lime Aluminum - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-BLIM -
ExtremaRatio - Satre FX - Exp Dark S600 - Fixed-blade knife
When you need more working space and a blade with more substance, SATRE FX is the answer. It takes the essential design of the Satre and scales it up, improving control and cutting capacity without compromising its ergonomics. It is designed for continuous use, where the hand must not tire and the tool must remain predictable.
SATRE FX is a full-tang fixed blade with a skeletonized frame, designed to maintain good balance even during extended sessions. The more generous geometry offers a larger cutting surface and more stable handling during demanding tasks. The open construction also allows you to customize the handle with Paracord, adapting it to your preferences. The knife comes with a black Kydex sheath, pre-shaped and ready to use.
Configurations and Steels
* N690Co (Black and Stone Washed): a balanced choice between edge retention, impact resistance, and ease of use in the field.
* Nitrogen (Orange and Yellow): greater corrosion resistance, easy resharpening, and high visibility.
* Böhler S600 (Black): high-performance steel, cryogenically treated to 64 HRC, designed for maximum edge retentionIntended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: S600 carbon steel, 64 HRC
Blade finish: Exp Dark
Handle: S600 carbon steel, 64 HRC
Blade length: 95 mm
Blade thickness: 5 mm
Overall length: 190 mm
Weight: 106 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Larger version compared to the Satre modelER-SATFX-S600 -
ExtremaRatio - Satre FX - Yellow Nitrogen - Fixed-blade knife
When you need more working space and a blade with more substance, SATRE FX is the answer. It takes the essential design of the Satre and scales it up, improving control and cutting capacity without compromising its ergonomics. It is designed for continuous use, where the hand must not tire and the tool must remain predictable.
SATRE FX is a full-tang fixed blade with a skeletonized frame, designed to maintain good balance even during extended sessions. The more generous geometry offers a larger cutting surface and more stable handling during demanding tasks. The open construction also allows you to customize the handle with Paracord, adapting it to your preferences. The knife comes with a black Kydex sheath, pre-shaped and ready to use.
Configurations and Steels
* N690Co (Black and Stone Washed): a balanced choice between edge retention, impact resistance, and ease of use in the field.
* Nitrogen (Orange and Yellow): greater corrosion resistance, easy resharpening, and high visibility.
* Böhler S600 (Black): high-performance steel, cryogenically treated to 64 HRC, designed for maximum edge retention.Intended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade Finish: High-visibility treatment
Handle: Nitrogen steel
Blade length: 95 mm
Blade thickness: 5 mm
Overall length: 190 mm
Weight: 97 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Larger version compared to the Satre modelER-SATFX-NY -
ExtremaRatio - Satre FX - Orange Nitrogen - Fixed-blade knife
When you need more working space and a blade with more substance, SATRE FX is the answer. It takes the essential design of the Satre and scales it up, improving control and cutting capacity without compromising its ergonomics. It is designed for continuous use, where the hand must not tire and the tool must remain predictable.
SATRE FX is a full-tang fixed blade with a skeletonized frame, designed to maintain good balance even during extended sessions. The more generous geometry offers a larger cutting surface and more stable handling during demanding tasks. The open construction also allows you to customize the handle with Paracord, adapting it to your preferences. The knife comes with a black Kydex sheath, pre-shaped and ready to use.
Configurations and Steels
* N690Co (Black and Stone Washed): a balanced choice between edge retention, impact resistance, and ease of use in the field.
* Nitrogen (Orange and Yellow): greater corrosion resistance, easy resharpening, and high visibility.
* Böhler S600 (Black): high-performance steel, cryogenically treated to 64 HRC, designed for maximum edge retention.Intended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade Finish: High-visibility treatment
Handle: Nitrogen steel
Blade length: 95 mm
Blade thickness: 5 mm
Overall length: 190 mm
Weight: 97 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Larger version compared to the Satre modelER-SATFX-NO -
ExtremaRatio - Satre FX - Black N690Co - Fixed-blade knife
When you need more working space and a blade with more substance, SATRE FX is the answer. It takes the essential design of the Satre and scales it up, improving control and cutting capacity without compromising its ergonomics. It is designed for continuous use, where the hand must not tire and the tool must remain predictable.
SATRE FX is a full-tang fixed blade with a skeletonized frame, designed to maintain good balance even during extended sessions. The more generous geometry offers a larger cutting surface and more stable handling during demanding tasks. The open construction also allows you to customize the handle with Paracord, adapting it to your preferences. The knife comes with a black Kydex sheath, pre-shaped and ready to use.
Configurations and Steels
* N690Co (Black and Stone Washed): a balanced choice between edge retention, impact resistance, and ease of use in the field.
* Nitrogen (Orange and Yellow): greater corrosion resistance, easy resharpening, and high visibility.
* Böhler S600 (Black): high-performance steel, cryogenically treated to 64 HRC, designed for maximum edge retention.Intended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: N690Co stainless steel, 58 HRC
Blade finish: MIL-C-13924 burnishing
Handle: N690Co stainless steel, 58 HRC
Blade length: 95 mm
Blade thickness: 5 mm
Overall length: 190 mm
Weight: 99 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Larger version compared to the Satre modelER-SATFX-BK -
ExtremaRatio - Satre F - Stonewashed Nitrogen & Outdoor Green Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: Stonewashed
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NSWODG -
ExtremaRatio - Satre F - Black Nitrogen & Periwinkle Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NBKP -
ExtremaRatio - Satre F - Black Nitrogen & Yellow Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NBKY -
ExtremaRatio - Satre FX - Stone Washed N690Co - Fixed-blade knife
When you need more working space and a blade with more substance, SATRE FX is the answer. It takes the essential design of the Satre and scales it up, improving control and cutting capacity without compromising its ergonomics. It is designed for continuous use, where the hand must not tire and the tool must remain predictable.
SATRE FX is a full-tang fixed blade with a skeletonized frame, designed to maintain good balance even during extended sessions. The more generous geometry offers a larger cutting surface and more stable handling during demanding tasks. The open construction also allows you to customize the handle with Paracord, adapting it to your preferences. The knife comes with a black Kydex sheath, pre-shaped and ready to use.
Configurations and Steels
* N690Co (Black and Stone Washed): a balanced choice between edge retention, impact resistance, and ease of use in the field.
* Nitrogen (Orange and Yellow): greater corrosion resistance, easy resharpening, and high visibility.
* Böhler S600 (Black): high-performance steel, cryogenically treated to 64 HRC, designed for maximum edge retention.
Intended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: N690Co stainless steel, 58 HRC
Blade finish: Stonewashed
Handle: N690Co stainless steel, 58 HRC
Blade length: 95 mm
Blade thickness: 5 mm
Overall length: 190 mm
Weight: 99 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Larger version compared to the Satre modelER-SATFX-SW -
ExtremaRatio - Satre F - Black Nitrogen & Orange Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NBKOR -
ExtremaRatio - Satre F - Total Black N690Co & Black Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: N690Co stainless steel, 58 HRC
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 96.5 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-TBK -
ExtremaRatio - Satre F - Stone Washed N690Co & Black Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.
Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: N690Co stainless steel, 58 HRC
Blade finish: Stonewashed
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 96.5 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-SWBK -
ExtremaRatio - Satre - Yellow Nitrogen - Fixed-Blade Neck Knife
SATRE is a compact fixed-blade knife developed in collaboration with Daniele Dal Canto, a guide with the AIGS (Italian Association of Survival Guides). It was created to deliver high performance in a compact format, designed for survival, bushcraft, urban use, and as a backup tool. The range has been updated with new variants in high-visibility Nitrogen steel.
SATRE features a skeletonized full-tang construction that allows the handle to be wrapped in Paracord, adapting it to the user’s needs. Its compact size and the pre-formed black Kydex sheath, equipped with metal eyelets for ambidextrous, vertical, or horizontal carrying configurations on various mounts, make it suitable for use as a neck knife, backup knife, or primary tool in a survival kit.
The range now includes versions in Nitrogen steel (Orange and Yellow), characterized by high corrosion resistance, ease of resharpening, and high visibility in the field.
These are joined by models in N690Co steel (Black, Expeditions, and Stone Washed), a historic benchmark of the series for its overall balance between performance and operational handling, and the variant in Böhler S600 steel (64 HRC), designed for maximum hardness and edge retention.
Intended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: High-visibility treatment
Handle: Nitrogen steel
Blade length: 70 mm
Blade thickness: 5 mm
Overall length: 163 mm
Weight: 75 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Version with high corrosion resistance and high visibilityER-SAT-YN -
ExtremaRatio - Satre - Orange Nitrogen - Fixed-Blade Neck Knife
SATRE is a compact fixed-blade knife developed in collaboration with Daniele Dal Canto, a guide with the AIGS (Italian Association of Survival Guides). It was created to deliver high performance in a compact format, designed for survival, bushcraft, urban use, and as a backup tool. The range has been updated with new variants in high-visibility Nitrogen steel.
SATRE features a skeletonized full-tang construction that allows the handle to be wrapped in Paracord, adapting it to the user’s needs. Its compact size and the pre-formed black Kydex sheath, equipped with metal eyelets for ambidextrous, vertical, or horizontal carrying configurations on various mounts, make it suitable for use as a neck knife, backup knife, or primary tool in a survival kit.
The range now includes versions in Nitrogen steel (Orange and Yellow), characterized by high corrosion resistance, ease of resharpening, and high visibility in the field.
These are joined by models in N690Co steel (Black, Expeditions, and Stone Washed), a historic benchmark of the series for its overall balance between performance and operational handling, and the variant in Böhler S600 steel (64 HRC), designed for maximum hardness and edge retention.
Intended use: Sport / Light Utility
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: High-visibility treatment
Handle: Nitrogen steel
Blade length: 70 mm
Blade thickness: 5 mm
Overall length: 163 mm
Weight: 75 g
Sheath: Thermoformed Kydex
Packaging: Cardboard box with Extrema Ratio logos
Notes: Version with high corrosion resistance and high visibilityER-SAT-ON -
ExtremaRatio - MF1 EVO D Outdoor - Satin Nitrogen & OD Green G10 - folding knife
A folding knife from the MF1 EVO platform, designed specifically for outdoor use. Engineered for use in natural environments and field activities.
Green G10 handle with a non-slip texture for a secure grip even in wet or dirty conditions. Full-flat Drop Point blade in Nitrogen steel with a satin finish: good corrosion resistance, edge retention suitable for intensive use, and the ability to be resharpened in the field.
Liner-Lock closure system with additional Hidden Lock safety. Internal structure reinforced with a double steel frame for greater rigidity. Reversible Deep Carry clip for deep carry.
Intended Use: Outdoor / Sports
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen Steel (58 HRC)
Blade Finish: Satin
Handle: Double stainless steel frame and textured G-10 scales
Blade Length: 95mm
Blade Thickness: 4mm
Closed length: 107 mm
Overall length: 230 mm
Weight: 170 g
Closure system: Liner Lock + Hidden Lock side safety system
Clip: “deep carry” type, stainless steel, removable and reversible
Packaging: Extrema Ratio box with official logos
Notes: -ER-MF1EVOD_OD -
ExtremaRatio - MF1 EVO D Knife - Satin Nitrogen & Black G10 - folding knife
A folding knife designed for everyday use and general-purpose operations. A version of the MF1 EVO platform featuring materials optimized for durability and easy maintenance.
Black G10 handle with a non-slip texture, designed to ensure a secure grip even in challenging conditions. Drop Point blade in Nitrogen steel with a satin finish: good corrosion resistance, decent edge retention, and easy to resharpen.
Liner-Lock closure system with additional Hidden Lock safety. Reinforced structure with a double steel frame for greater rigidity. Reversible Deep Carry clip for deep and discreet carry.
Intended Use: Outdoor / Sports
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen Steel (58 HRC)
Blade Finish: Satin
Handle: Double stainless steel frame and textured G-10 scales
Blade Length: 95mm
Blade Thickness: 4mm
Closed length: 107 mm
Overall length: 230 mm
Weight: 170 g
Closure system: Liner Lock + Hidden Lock side safety system
Clip: “deep carry” type, stainless steel, removable and reversible
Packaging: Extrema Ratio box with official logos
Notes: -ER-MF1EVOD-BK -
ExtremaRatio - MF1 EVO SP Knife - Black N690Co & OD Green G10 - folding knife
A folding knife from the MF1 EVO platform featuring a Spear Point blade designed for operational and outdoor use. Designed for general operational use and daily use in technical or field settings.
Green G10 handle with non-slip texture for a secure grip even in difficult conditions or when wearing gloves. Spear Point blade in Böhler N690 steel with a burnished finish: good corrosion resistance, edge retention, and reliable performance under intensive use.
Liner-Lock closure system with additional Hidden Lock safety. Internal structure with double steel frame for greater rigidity and reduced twisting under load. Reversible Deep Carry clip for deep, discreet carry.
Green Black configuration: reduced visual contrast with the operational or natural environment. Functional color choices, designed to blend with outdoor gear.
Intended use: Tactical / Operational
Production Type: Industrial
Country of Manufacture: Italy
Blade: Böhler N690Co stainless steel (58 HRC)
Blade Finish: MIL-C-13924 burnished
Handle: Burnished stainless steel double frame and textured G-10 scales
Blade Length: 96mm
Blade Thickness: 4mm
Closed length: 107 mm
Overall length: 231 mm
Weight: 167 g
Closure system: Liner Lock + Hidden Lock side safety system
Clip: “deep carry” type, burnished stainless steel, removable and reversible
Packaging: Extrema Ratio box with official logos
Notes: -ER-MF1EVOSP-OD -
ExtremaRatio - MF1 EVO SP - Total Black N690Co & G10 - folding knife
Folding knife from the MF1 EVO platform featuring a Spear Point blade and an all-black finish. Designed for general-purpose operational use and daily use in technical or professional settings.
Black G10 handle with non-slip texture for a secure grip even in difficult conditions or when wearing gloves. Spear Point blade in Böhler N690 steel with a burnished finish: good corrosion resistance, edge retention, and reliable performance under heavy use.
Liner-Lock closure system with additional Hidden Lock safety. Internal double-frame steel structure for greater rigidity and reduced twisting under load. Reversible Deep Carry clip for deep, discreet carry.
Total Black configuration: matte or burnished surfaces to reduce glare and visual signature for discretion.
Intended use: Tactical / Operational
Production Type: Industrial
Country of Manufacture: Italy
Blade: Böhler N690Co stainless steel (58 HRC)
Blade Finish: MIL-C-13924 burnishing
Handle: Burnished stainless steel double frame and textured G-10 scales
Blade Length: 96mm
Blade Thickness: 4mm
Closed length: 107 mm
Overall length: 231 mm
Weight: 167 g
Closure system: Liner Lock with Hidden Lock side safety system
Clip: “deep carry” type, burnished stainless steel, removable and reversible
Packaging: Extrema Ratio box with official logos
Notes: -ER-MF1EVOSP-TB -
ExtremaRatio - Folgore Verticale - Black M390 Limited Edition – Military Fixed Blade Compact Knife
A compact fixed-blade knife designed for high-intensity operational use, where weight, size, and reliability are critical factors. The FOLGORE VERTICALE builds on the experience of the FOLGORE Nitrogen model, evolving its design into an even more streamlined and high-performance version.
The 61 HRC Böhler M390 steel blade offers high wear resistance, edge retention, and consistent performance even under harsh conditions. The blued finish reduces glare, optimizing its use in tactical environments. The tip geometry and balance are designed to ensure precision, control, and rapid execution.
The design prioritizes weight reduction and ergonomic efficiency, allowing for extended carry without fatigue and immediate use in any operational context.
Supplied with a thermoformed Kydex sheath featuring a modular platform compatible with multiple configurations.
Limited edition of only 300 numbered pieces, intended for collectors and professional users.
Intended use: Collectible / Utility / Tactical
Production type: Industrial
Country of manufacture: Italy
Blade: hidden tang in Bohler M390 stainless steel, 61 HRC
Blade finish: MIL-C-13924 burnishing
Handle: removable, in Forprene
Blade length: 128 mm.
Blade thickness: 4.8 mm.
Overall length: 242 mm.
Weight: 164 g.
Sheath: Kydex, thermoformed, with a modular platform compatible with multiple configurations
Packaging: Cardboard box with Extrema Ratio logos
Notes: Numbered and limited edition of only 300 piecesER-FOLV-LE -
ExtremaRatio - Folgore - Nitrogen Stonewashed & Black Forprene - Military Fixed Blade Compact Knife
A compact fixed-blade knife designed for continuous operational use, where compact size, structural strength, and reliability are primary requirements. FOLGORE Nitrogen is the result of a joint development with the “Folgore” Parachute Brigade and validation through field testing in real-world scenarios.
The Nitrogen steel blade combines corrosion resistance, edge retention, and mechanical strength, while maintaining a slim profile to optimize weight and portability. The tapered tip geometry allows for precision and control during technical operations, ensuring an immediate and reliable response.
The handle is designed to maximize ergonomics and grip, ensuring control even in dynamic conditions and during prolonged use. The overall balance promotes maneuverability and speed of use without compromising sturdiness.
Designed for direct integration into gear, the FOLGORE Nitrogen is configured for discreet and continuous carry, minimizing bulk without sacrificing functionality thanks to the thermoformed Kydex sheath with a modular platform compatible with multiple configurations.
Intended Use: Multi-purpose / Utility / TacticalProduction Type: Industrial
Country of Manufacture: Italy
Blade: Hidden tang in Nitrogen nitrogen-alloy steel
Blade Finish: Stonewashed
Handle: Removable, Forprene
Blade Length: 128mm.
Blade thickness: 4.8 mm.
Overall length: 242 mm.
Weight: 164 g.
Sheath: Kydex, thermoformed, with a modular platform compatible with multiple configurations
Packaging: Cardboard box with Extrema Ratio / Army / Folgore logos
Notes: Product manufactured under official licenses from the Italian ArmyER-FOLN -
ExtremaRatio - Fulcrum Bayonet EVO NFG - Stonewashed N690Co & Desert Forprene - Multi-purpose Knife
Following the success of the FULCRUM multi-purpose knife, the bayonet version was developed, designed for even more specific and demanding applications. Like the FULCRUM, the bayonet is an extremely robust and versatile knife: the blade withstands breaking loads exceeding 150 kg, the tip is extremely durable, and the profile allows for extended use without compromising the sharpness of the cutting edge. The forward-shifted center of gravity, combined with the blade’s weight, ensures excellent performance in the most demanding fieldwork, offering power and control even under the toughest conditions.
The 2026 EVO model introduces a major design update: the knife’s tang now features a completely redesigned structure, engineered to improve structural rigidity and optimize stress management during the most intense use, while also offering a more precise and secure feel during technical tasks.
This specific civilian NFG (No Fixing Gear) version retains the same operational structure but lacks the rifle attachment mechanisms, making it more streamlined, lightweight, and geared toward professional outdoor use.
Intended Use: Multi-purpose / Utility / TacticalProduction Type: Industrial
Country of Manufacture: Italy
Blade: hidden tang in N690Co stainless steel, 58 HRC
Blade finish: Stonewashed
Handle: detachable, made of Forprene, with a full-tang guard and stainless steel tang.
Blade length: 180 mm.
Blade thickness: 6.3 mm.
Overall length: 309 mm.
Weight: 391 g.
Sheath: modular tactical nylon thigh sheath with polymer interior, equipped with a wire cutter and diamond-coated plate for field sharpening
Packaging: Cardboard box with Extrema Ratio logos
Notes: Civilian version without weapon attachment systems, making the Fulcrum EVO Bayonet a standard knife available for free sale and legal possessionER-FBEVNF-SW -
ExtremaRatio - Fulcrum Bayonet EVO NFG - Black N690Co & OD Green Forprene - Multi-purpose Knife
Following the success of the FULCRUM multi-purpose knife, the bayonet version was developed, designed for even more specific and demanding applications. Like the FULCRUM, the bayonet is an extremely robust and versatile knife: the blade withstands breaking loads exceeding 150 kg, the tip is extremely durable, and the profile allows for extended use without compromising the sharpness of the cutting edge. The forward-shifted center of gravity, combined with the blade’s weight, ensures excellent performance in the most demanding field work, offering power and control even under the toughest conditions.
The 2026 EVO model introduces a major design update: the knife’s tang now features a completely redesigned structure, engineered to improve structural rigidity and optimize stress management during the most intense use, while also offering a more precise and secure feel during technical tasks.
This specific civilian NFG (No Fixing Gear) version retains the same operational structure but lacks the rifle attachment mechanisms, making it more streamlined, lightweight, and geared toward professional outdoor use.
Intended Use: Multi-purpose / Utility / TacticalProduction Type: Industrial
Country of Manufacture: Italy
Blade: Hidden tang in N690Co stainless steel, 58 HRC
Blade Finish: MIL-C-13924 burnished
Handle: Detachable, made of Forprene, with a full-length guard and burnished stainless steel tang.
Blade length: 180mm.
Blade thickness: 6.3mm.
Overall length: 309mm.
Weight: 391g.
Sheath: Modular tactical nylon thigh sheath with polymer interior, equipped with a wire cutter and diamond-coated plate for field sharpening
Packaging: Cardboard box with Extrema Ratio logos
Notes: Civilian version without weapon attachment systems, making the Fulcrum EVO Bayonet a standard knife available for free sale and legal possessionER-FBEVNF-OD -
ExtremaRatio - Fulcrum Bayonet EVO NFG - Black N690Co & Black Forprene - Multi-purpose Knife
Following the success of the FULCRUM multi-purpose knife, the bayonet version was developed, designed for even more specific and demanding applications. Like the FULCRUM, the bayonet is an extremely robust and versatile knife: the blade withstands breaking loads exceeding 150 kg, the tip is extremely durable, and the profile allows for extended use without compromising the sharpness of the cutting edge. The forward-shifted center of gravity, combined with the blade’s weight, ensures excellent performance in the most demanding field work, offering power and control even under the toughest conditions.
The 2026 EVO model introduces a major design update: the knife’s tang now features a completely redesigned structure, engineered to improve structural rigidity and optimize stress management during the most intense use, while also offering a more precise and secure feel during technical tasks.
This specific civilian NFG (No Fixing Gear) version retains the same operational structure but lacks the rifle attachment mechanisms, making it more streamlined, lightweight, and geared toward professional outdoor use.
Intended Use: Multi-purpose / Utility / TacticalProduction Type: Industrial
Country of Manufacture: Italy
Blade: Hidden tang in N690Co stainless steel, 58 HRC
Blade Finish: MIL-C-13924 burnished
Handle: Detachable, made of Forprene, with a full-length guard and burnished stainless steel tang.
Blade length: 180mm.
Blade thickness: 6.3mm.
Overall length: 309mm.
Weight: 391g.
Sheath: Modular tactical nylon thigh sheath with polymer interior, equipped with a wire cutter and diamond-coated plate for field sharpening
Packaging: Cardboard box with Extrema Ratio logos
Notes: Civilian version without weapon attachment systems, making the Fulcrum EVO Bayonet a standard knife available for free sale and legal possessionER-FBEVNF-BK -
Extremaratio - Kydex sheath for RAO C knife - official accessory and replacement part
Original accessory designed for the RAO C model by Extrema Ratio. Designed for the safe transport of the open blade knife in outdoor environments, this Kydex sheath is the ideal solution for those who want maximum stability, modularity, and resistance in all operating conditions.
Lightweight, sturdy, and weather-resistant, the sheath is made of high-strength thermoformed Kydex:
* Does not absorb water
* Resistant to moisture, mud, and temperature changes
* Does not require complex maintenance
* Maintains retention over timeThe structure ensures safe and stable knife storage, reducing unwanted movement during transport.
The sheath is designed for different carrying configurations (sold separately), adapting to every operational need:
* MOLLE ready – direct attachment to backpacks and modular systems using paracord
* Clip – quick and discreet carrying on a belt or pocket
* Ulticlip – stable attachment even without a belt
* Malice Clip – horizontal attachment to belt or tactical belts
* Belt Clip – vertical and/or horizontal carry on belt
* Shoulder strap – balanced transport during dynamic activitiesThe configurability allows the knife to be integrated into the equipment without compromising accessibility and safety.
Ideal for:
* Operational bushcraft
* Advanced camping
* Professional outdoor use
* Prepping
* Intensive field useCompatibility
✔ Compatible exclusively with Extrema Ratio RAO C models
✖ Not compatible with other models in the RAO seriesPackage contents
1x Kydex sheath for RAO C
(Knife not included – sold separately)ER-RAO-C-FK -
ExtremaRatio - M1A1 Last Call - PRIVATE COLLECTION - multi-purpose rescue knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously purchased
* Condition: Like new, never used and never removed from its packaging
* Available on the market Limited edition of 130 pieces
* Sharpening: Factory sharpened
* Marks on blade: No
* Marks on handle: No
* Box: Present
* Sheath: /
* Manuals, Certificates, and Warranties: Present
* Checked and certified by our in-house laboratoryThe M1A1 model is Extrema Ratio's personal interpretation, created to pay homage to the historic folding knife used by the Italian Army.
During World War II, the original knife was part of the British Army's equipment. At the end of the war, thanks to the “Marshall Plan” for European recovery, the Italian Army received some of the weapons and equipment supplied to the Allies during the war, including this multifunctional tool. It was later reproduced in Italy in three modified versions.
Extrema Ratio, to bid farewell to this historic and renowned knife, presents a final exclusive version, limited to only 130 pieces.
Like its predecessor, the M1A1 LAST CALL is equipped with a can opener, bottle opener, screwdriver, and knot-tying peg. The reversible clip is designed for maximum concealability.
The drop blade, like all the other tools listed above, features Geotech Camo customization, Extrema Ratio's innovative and original camouflage pattern, created using laser engraving.
The locking mechanism used is the tried and tested LINER LOCK. The handle consists of two anticorodal aluminum scales anodized in the brand new Tactical Mud color.
Type of production: industrial
Blade: N690Co 58HRC stainless steel with Geotech Camo finish
Country of production: Italy
Handle: Anticorodal in Tactical Mud color
Blade length: 70mm.
Blade thickness: 3mm.
Closed length: 99mm.
Total length: 168mm.
Weight: 124g.
Closure: Liner Lock
Clip: reversible and removable stainless steel
Notes: Screwdriver, can opener, bottle opener, knot untangler - serial number 81ER-BFM1A1LC-CP -
Extremaratio - RAO C Outdoor - Folding Knife - n690 - Heavy Duty Outdoor
The RAO C Outdoor is a heavy-duty folding knife designed by Extrema Ratio to ensure maximum strength, reliability and field versatility.
Derived from the renowned RAO II, this version keeps the solid RAO C structure while adopting features tailored to outdoor tasks. It includes a Böhler N690 stone washed blade, green cerakote aluminum handle, and a dual locking system for extra safety under heavy use.
Designed for advanced camping, operational bushcraft and demanding fieldwork, it offers an excellent balance of control, portability and consistent performance in natural settings.
Technical specs:
Intended use: advanced outdoor - bushcraft - operational camping
Country of origin: Made in Italy
Blade: Böhler N690 steel (58 HRC) – high corrosion resistance and edge stability
Blade finish: stone washed (reduced marks, easy maintenance)
Blade grind: flat
Handle: anodized Anticorodal aluminum with cerakote + dual steel frame
Blade length: 100 mm
Blade thickness: 4 mm
Overall length: 225 mm
Weight: approx. 236 g (Outdoor version)
Locking system: bar & pin lock with dual safety
Clip/Sheath: steel clip + Kydex sheath
Packaging: Extrema Ratio branded box, laser-cut RAO C gadget, outdoor Kydex sheath
Note: green handle with high-visibility paracord for fast retrievalER-RAO-C-O -
Extrema Ratio - Sethlans S600 Outdoor - Bushcraft Knife / S600 / Fixed Blade
Designed to face the challenges of the natural environment in professional contexts, the Sethlans S600 Outdoor by Extrema Ratio is one of the most technical and reliable interpretations of the field knife concept. A functional evolution of the original Sethlans, this model features cryo-treated Böhler S600 steel at 64 HRC, ensuring exceptional edge retention and wear resistance in harsh conditions.The full tang stone washed blade ensures long-term durability and easy maintenance, while the removable green G10 handle offers a secure grip even in wet or muddy conditions. The lightweight modular Kydex sheath supports multiple carry options, meeting the needs of professionals, experienced bushcrafters, and survival experts. Every detail is designed to ensure maximum reliability and usability in the field.Intended use: Outdoor - bushcraft - professional survivalProduction type: Industrial (Extrema Ratio Outdoor line)
Country of origin: Italy
Blade: Böhler S600 - HRC 64 - cryo-treated
Blade finish: Stone washed
Handle: Green G10 - removable
Blade length: 107 mm
Blade thickness: from 6.3 mm to 4 mm
Overall length: 224 mm
Weight: 221 g
Sheath: Kydex
Packaging: Standard Extrema Ratio box
Notes: Includes modular Kydex sheath, Ulticlip, MOLLE-compatible, Malice Clip, and underarm strapER-SET-O -
ExtremaRatio - F.O.K. Nitrogen Outdoor - FOK Compact Knife - Knife
The F.O.K. Nitrogen Outdoor is a fixed blade knife designed for outdoor use, balancing low weight (164 g) with the structural strength of Nitrogen steel. The 4.8 mm thick blade with a flat grind profile is suitable for carving, firewood preparation, working with natural materials, and precision cuts.
The stone washed finish enhances abrasion resistance and simplifies maintenance in outdoor environments. The ergonomic Forprene handle scales offer a secure grip even with wet or dirty hands, ideal for bushcraft, trekking, and advanced camping activities.
The modular carrying system with MOLLE-compatible Kydex sheath and multiple clip systems makes it easy to integrate the knife into technical gear, backpacks, or belts.
This model is positioned in the advanced outdoor category, offering reliable field performance without unnecessary technical overload.
Intended use: Professional outdoor, bushcraft, and advanced outdoor activities
Production type: Industrial, Italian production by Extrema Ratio
Country of origin: Italy
Blade: Full tang Nitrogen steel – high nitrogen content steel optimized for strength and corrosion resistance
Blade finish: Stone washed
Blade grind: Flat edge for versatile outdoor cutting tasks
Handle: Monolithic Forprene with green ergonomic scales – non-slip grip even with wet or dirty hands
Blade length: 128 mm
Blade thickness: 4.8 mm
Overall length: 242 mm
Weight: 164 g
Sheath: Lightweight, durable Kydex – water-resistant and maintenance-free
Packaging: Box with Extrema Ratio branding
Note: High-visibility orange paracord included – easy to locate on difficult terrainER-FOK -
Zero Tolerance - ZT0117 DuraLock - Satin CPM-MagnaCut & Carbon Fiber - knife
Inspired by the legendary F-117 Stealth, the 0117 brings the same angular precision and engineering efficiency to a modern everyday carry. The slim, sculpted profile is unmistakably ZT: refined, contemporary, and designed for those who appreciate understated complexity. The lightweight carbon fiber handle pairs with a two-tone CPM MagnaCut blade, with satin and stonewashed finishes, striking a perfect balance between elegance and character. The custom thumb stud and precision-machined DuraLock mechanism ensure smooth and secure operation, while titanium spacer tubes and partially integrated liners maintain a solid structure without adding weight. Sleek and functional, the 0117 represents ZT's vision of modern precision.
Key features
* Premium Made in USA folder designed for a slim and refined EDC; lightweight carbon fiber scales
* CPM MagnaCut blade with excellent edge retention, toughness, and corrosion resistance; two-tone satin/stonewashed finish for a sophisticated look
* Slim DuraLock design with custom thumb stud and precision-machined lock pin; smooth opening on KVT bearings
* Partially integrated liners and tubular titanium spacers for maximum strength at reduced weight
* Deep-carry wraparound clip for secure and balanced carry, reversible right/left
Intended use: Sports / CollectionType of production: Industrial
Country of production: USA
Blade: CPM-MagnaCut steel at 62/64HRC
Blade finish: Satin
Handle: Carbon fiber with blue anodized titanium spacers and Black Oxide screws
Blade length: 84mm.
Blade thickness: 2.3mm.
Closed length: 116mm.
Total length: 200mm.
Weight: 54g.
Closure: DuraLock (modified Cross Bar Lock / Axis Lock)
Clip: Removable and reversible, deep pocket type, stainless steel treated with Cerakote
Packaging: cardboard box with Zero Tolerance logos
Notes: flipper opening system on KVT ceramic ball bearingsZT0117 -
ExtremaRatio - Ant Urban Neon SF Yellow - DLC N690Co & Anticorodal - folding knife
When form and function find their balance.
ANT URBAN is designed to be appreciated and used every day. Essential on the outside, surprising in the details. Urban tones, satin finish, clean lines. Razor-sharp sheepfoot blade. For those who consider EDC an expression of their style.
NEON ENERGY
To remind you who you are, even when everything around you is gray. Impossible to ignore. Created for those who don't live in the choir, but outside it. When the world aims to blend in, you choose to stand out. A small gesture that breaks the urban monotony: live in color where others remain in grayscale. Those who carry an ANT URBAN NEON don't seek attention... they generate it.If you appreciate things that are well made and say something about you, then this is the tool for you.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with DLC finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 51mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 126mm.
Weight: 44g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 09/12/2025ER-ANTUN-SFYL -
ExtremaRatio - Ant Urban Neon SF Blue - DLC N690Co & Anticorodal - folding knife
When form and function find their balance.
ANT URBAN is designed to be appreciated and used every day. Essential on the outside, surprising in the details. Urban tones, satin finish, clean lines. Razor-sharp sheepfoot blade. For those who consider EDC an expression of their style.
NEON ENERGY
To remind you who you are, even when everything around you is gray. Impossible to ignore. Created for those who don't live in the choir, but outside it. When the world aims to blend in, you choose to stand out. A small gesture that breaks the urban monotony: live in color where others remain in grayscale. Those who carry an ANT URBAN NEON don't seek attention... they generate it.If you appreciate things that are well made and say something about you, then this is the tool for you.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with DLC finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 51mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 126mm.
Weight: 44g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 09/12/2025ER-ANTUN-BL -
ExtremaRatio - Ant Urban SF Gold - Satin N690Co & Anticorodal - folding knife
When form and function find their balance.
ANT URBAN is designed to be appreciated and used every day. Essential on the outside, surprising in the details. Urban tones, satin finish, clean lines. Razor-sharp sheepfoot blade. For those who consider EDC an expression of their style.Black Classic: a timeless icon.
Gold Touch: an accent of personality.
Cherry Satin: bold color, authentic character.If you recognize the value of things done well, then ANT URBAN is for you.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with satin finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 51mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 126mm.
Weight: 44g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 09/12/2025ER-ANTU-SF-GO -
ExtremaRatio - Ant Urban SF Cherry - Satin N690Co & Anticorodal - folding knife
When form and function find their balance.
ANT URBAN is designed to be appreciated and used every day. Essential on the outside, surprising in the details. Urban tones, satin finish, clean lines. Razor-sharp sheepfoot blade. For those who consider EDC an expression of their style.Black Classic: a timeless icon.
Gold Touch: an accent of personality.
Cherry Satin: bold color, authentic character.If you recognize the value of things done well, then ANT URBAN is for you.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with satin finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 51mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 126mm.
Weight: 44g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 09/12/2025ER-ANTU-SF-CH -
ExtremaRatio - Ant Urban SF Black Classic - Satin N690Co & Anticorodal - folding knife
When form and function find their balance.
ANT URBAN is designed to be appreciated and used every day. Essential on the outside, surprising in the details. Urban tones, satin finish, clean lines. Razor-sharp sheepfoot blade. For those who consider EDC an expression of their style.Black Classic: a timeless icon.
Gold Touch: an accent of personality.
Cherry Satin: bold color, authentic character.If you recognize the value of things done well, then ANT URBAN is for you.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with satin finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 51mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 126mm.
Weight: 44g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 09/12/2025ER-ANTU-SF-BC -
ExtremaRatio - Ant SP Tactical Mud - Stonewashed N690Co & Anticorodal - folding knife
Small Blade. Giant Power
For those who live by the “always ready” mentality: when compactness and performance meet, the result is a tool that never disappoints. ANT SP is designed to operate anywhere, with maximum discretion.
Spear point, reinforced construction, secure grip. Compact, fast, reliable in close contact. A tool designed for those looking for real functionality, not just an EDC disguised as something more.
If you don't measure centimeters, but missions, then you're in the right place.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with stonewashed finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 46mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 123mm.
Weight: 42g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 12/09/2025ER-ANT-SPTM -
ExtremaRatio - Ant SP Ranger Green - Stonewashed N690Co & Anticorodal - folding knife
Small Blade. Giant Power
For those who live by the “always ready” mentality: when compactness and performance meet, the result is a tool that never disappoints. ANT SP is designed to operate anywhere, with maximum discretion.
Spear point, reinforced construction, secure grip. Compact, fast, reliable in close contact. A tool designed for those looking for real functionality, not just an EDC disguised as something more.
If you don't measure centimeters, but missions, then you're in the right place.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with stonewashed finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 46mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 123mm.
Weight: 42g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 12/09/2025ER-ANT-SP-RG -
ExtremaRatio - Ant SP Total Black - DLC N690Co & Anticorodal - folding knife
Small Blade. Giant Power
For those who live by the “always ready” mentality: when compactness and performance meet, the result is a tool that never disappoints. ANT SP is designed to operate anywhere, with maximum discretion.
Spear point, reinforced construction, secure grip. Compact, fast, reliable in close contact. A tool designed for those looking for real functionality, not just an EDC disguised as something more.
If you don't measure centimeters, but missions, then you're in the right place.
Type of production: industrial
Country of production: Italy
Blade: N690Co stainless steel at 58HRC with DLC finish
Handle: stainless steel and anodized anticorodal aluminum
Blade length: 46mm.
Blade thickness: 2.4mm.
Closed length: 55mm.
Total length: 123mm.
Weight: 42g.
Locking system: Frame Lock
Clip: removable, stainless steel
Notes: part of “The Urban Beauty” collection, launched on 12/09/2025ER-ANTSP-TB -
Zero Tolerance - 0006TSOL Fixed Knife - Tigerstripe CPM-3V & OD Green G10 - knife
Intended use: Tactical / Sports
Type of production: Industrial
Country of manufacture: USA
Blade: full tang in CPM-3V carbon steel
Blade treatment: Tigerstripe coating and Cerakote protective treatment
Handle: G10 OD Green with stainless steel guard
Blade length: 152mm.
Blade thickness: 4.8mm.
Total length: 272mm.
Handle thickness: 17.8 mm.
Weight: 292 g.
Sheath: Kydex, with removable nylon belt attachment system
Packaging: cardboard box with Zero Tolerance logos
Notes: -ZT0006TSOL -
ExtremaRatio - Rao Steel - Satin Nitrogen - Outdoor Utility Knife
RAO STEEL is the outdoor knife to take everywhere: trekking, survival, camping, or simply in your backpack. 5 mm fixed blade, customizable grip, technical sheath.
Designed for those who don't seek fortune but rely on their equipment. Always reliable, everywhere. No compromises.
Derived from the legendary folding RAO, RAO STEEL distills its tactical essence into an even more compact and practical fixed blade version. A knife designed for action, designed to tackle nature and every need in the field. RAO STEEL cuts, carves, and splits.
From wood for lighting a fire to building a shelter, to the most precise tasks when camping or on daily excursions.
RAO STEEL NITROGEN SATIN
For those who love clean and essential functionality: high corrosion-resistant Nitrogen steel, easy to resharpen even with makeshift tools. Satin finish: perfect for outdoor contexts, even in food preparation. Ideal in humid, variable environments and on long journeys.Intended use: Outdoor / Utility
Type of production: industrial
Country of production: Italy
Blade: full tang, Nitrogen steel
Blade finish: Satin
Handle: monolithic, perforated, Nitrogen steel
Blade length: 87mm.
Blade thickness: 5 mm.
Total length: 190 mm.
Weight: 128 g.
Sheath: Kydex, ambidextrous, with double button loop attachment
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-RAOST-SA -
ExtremaRatio - Rao Steel - Dark Stone N690Co - Outdoor Utility Knife
RAO STEEL is the outdoor knife to take everywhere: trekking, survival, camping, or simply in your backpack. 5 mm fixed blade, customizable grip, technical sheath.
Designed for those who don't leave things to chance but rely on their equipment. Always reliable, everywhere. No compromises.
Derived from the legendary folding RAO, RAO STEEL distills its tactical essence into an even more compact and practical fixed blade version. A knife designed for action, designed to tackle nature and every need in the field. RAO STEEL cuts, carves, and splits.
From wood for lighting a fire to building a shelter, to the most precise tasks when camping or on daily excursions.
RAO STEEL N690 DARK STONE
For those seeking performance and operational simplicity: Böhler N690 steel (58 HRC) with MIL-C-13924 treatment and stone-washed finish. It hides wear and tear, works hard, and doesn't stand out. For those who leave nothing to chance, even in everyday life.Intended use: Outdoor / Utility
Type of production: industrial
Country of production: Italy
Blade: full tang, N690Co stainless steel at 58HRC
Blade finish: MIL-C-13924 burnishing with Dark Stone finish
Handle: monolithic, perforated, N690Co stainless steel at 58HRC
Blade length: 87mm.
Blade thickness: 5mm.
Total length: 190mm.
Weight: 130g.
Sheath: Kydex, ambidextrous, with double button loop attachment
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-RAOST-BK -
ExtremaRatio - Venatus F - N690Co Satin & Black G10 - Hunting Knife
Consistent performance, even under stress. - A tool designed for those who take hunting seriously, every day.
The VENATUS F Böhler N690 Black Satin with black G10 handle is designed for intensive and continuous use. The 12 cm blade in satin-finished Böhler N690 steel (58 HRC) guarantees excellent edge retention, wear resistance, and stability over time. The black G10 handle offers a firm and reliable grip, even in wet conditions or when wearing gloves.Intended use: Hunting / Light Utility
Type of production: Industrial
Country of production: Italy
Blade: full tang, N690Co stainless steel at 58HRC
Blade finish: Satin
Handle: G10
Blade length: 119mm.
Blade thickness: 3.8 mm.
Total length: 248 mm.
Weight: 235 g.
Sheath: leather, ambidextrous, modular, made in Italy
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-VF-BG -
ExtremaRatio - Venatus F - N690Co Satin & Walnut Wood - Hunting Knife
Elegance that works hard - Ideal for those who seek the best in every respect.
The VENATUS F Böhler N690 Black Satin with walnut wood handle is dedicated to those who love reliable tools that are also beautiful to look at and touch. The 12 cm satin-finished blade in Böhler N690 steel (58 HRC) offers an excellent combination of sharpness, durability, and resistance. The walnut wood handle expresses a strong and personal identity, making each knife unique in terms of grain and feel.Intended use: Hunting / Light Utility
Type of production: Industrial
Country of production: Italy
Blade: full tang, N690Co stainless steel at 58HRC
Blade finish: Satin
Handle: Walnut wood
Blade length: 119mm.
Blade thickness: 3.8mm.
Total length: 248mm.
Weight: 185g.
Sheath: leather, ambidextrous, modular, made in Italy
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-VF-W -
ExtremaRatio - Venatus F - Nitrogen Satin & Black G10 - Hunting Knife
Uncompromising versatility and robustness - The ideal companion for those who approach hunting as a discipline and technique.
The VENATUS F Nitrogen Black Satin with black G10 handle is designed to tackle every stage of the hunt. The 12 cm satin-finished blade, with spear point profile and counter-grinding, is made of Nitrogen steel, ideal for humid environments and prolonged use. The technical and resistant G10 handle guarantees control and durability even in the most difficult conditions.
Intended use: Hunting / Light UtilityType of production: Industrial
Country of production: Italy
Blade: full tang, made of Nitrogen steel
Blade finish: Satin
Handle: G10
Blade length: 119 mm.
Blade thickness: 3.8 mm.
Total length: 248 mm.
Weight: 235 g.
Sheath: leather, ambidextrous, modular, made in Italy
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-VF-NGB -
ExtremaRatio - Venatus S - Nitrogen Satin & Black G10 - Hunting Knife
Compact, balanced, decisive. - Perfect for the modern hunter who accepts no compromises.
The VENATUS S Nitrogen Black Satin with black G10 handle is the ideal tool for finishing and precision work while hunting. The 9 cm blade in satin-finished Nitrogen steel guarantees a clean cut, resistance to oxidation, and easy resharpening, even in harsh environmental conditions. The black G10 handle ensures a firm and reliable grip, designed for technical and intensive use.
Intended use: Hunting / Light UtilityType of production: Industrial
Country of production: Italy
Blade: full tang, Nitrogen steel
Blade finish: Satin
Handle: G10
Blade length: 90mm.
Blade thickness: 3.8mm.
Total length: 220mm.
Weight: 235g.
Sheath: leather, ambidextrous, modular, made in Italy
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-VS-NBG -
ExtremaRatio - Venatus S - Nitrogen Satin & Walnut Wood - Hunting Knife
Natural Precision - A knife that becomes an extension of the hand and spirit.
The VENATUS S Nitrogen Satin with walnut wood handle combines performance and tradition. Its 9 cm satin-finished Nitrogen steel blade is ideal for detailed work: clean cuts, controlled movements, maximum sensitivity. The walnut handle adds a warm and authentic touch, for those seeking a deep connection with the essence of hunting.
Intended use: Hunting / Light Utility
Type of production: Industrial
Country of production: Italy
Blade: full tang, Nitrogen steel
Blade finish: Satin
Handle: Walnut wood
Blade length: 90mm.
Blade thickness: 3.8mm.
Total length: 220mm.
Weight: 180g.
Sheath: leather, ambidextrous, modular, made in Italy
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-VS-NW -
ExtremaRatio - Vipera - Stonewashed Nitrogen & HCS Forprene - utility knife
VIPERA is born from the fusion between the tactical and survival worlds, combining speed of use, robustness, and precision in a knife weighing less than 100 grams. Equipped with an elongated drop-point blade with a full flat grind and narrow edge, it offers penetration, smooth cutting, and hardness up to 61 HRC. It is available in two high-performance steels, both with excellent edge retention and corrosion resistance. The ergonomic handle with integrated guard ensures maximum control in all conditions, while the ASPIS nylon sheath allows for stable and versatile carrying.
VIPERA Nitrogen (Stone Washed, HCS, Ranger Green)
This variant is designed for outdoor, survival, bushcraft, and prepping users: areas where reliability in the field, weather resistance, and maintainability are essential. Nitrogen steel maintains excellent edge retention, combined with excellent rust resistance and, above all, greater ease of resharpening compared to M390. The increased resilience makes these models more tolerant to the abuse typical of a field environment.Technical insight into nitrogen-added steels
Nitrogen steels, or nitrogen-added steels, are alloys in which nitrogen is used as an alloying element instead of, or in addition to, carbon. Although nitrogen is less effective than carbon in hardening the martensitic matrix, it has the advantage of forming stable compounds with chromium to a much lesser extent. This allows a greater amount of chromium to be kept in solid solution, improving corrosion resistance. In addition, nitrogen contributes to the hardness and stability of the structure, giving these steels a good balance between hardness, toughness, and corrosion resistance. Compared to traditional martensitic steels, nitrogen steels can therefore offer a better combination of mechanical properties and resistance to chemicals, while maintaining good workability and sharpenability characteristics.Intended use: Outdoor / Utility / Bushcraft
Type of production: Industrial
Country of production: Italy
Blade: nitrogen-alloyed stainless steel
Blade treatment: Stonewashed
Handle: Forprene
Blade length: 116mm.
Blade thickness: 4 mm.
Total length: 236 mm.
Weight: 95 g.
Sheath: ASPIS nylon with two multi-position clips, M.O.L.L.E. compatible.
Packaging: Cardboard box with Extrema Ratio logos.
Notes: -ER-VIP-SNH -
ExtremaRatio - Vipera - Stonewashed Nitrogen & Ranger Green Forprene - utility knife
VIPERA is born from the fusion between the tactical and survival worlds, combining speed of use, robustness, and precision in a knife weighing less than 100 grams. Equipped with an elongated drop-point blade with a full flat grind and narrow edge, it offers penetration, smooth cutting, and hardness up to 61 HRC. It is available in two high-performance steels, both with excellent edge retention and corrosion resistance. The ergonomic handle with integrated guard ensures maximum control in all conditions, while the ASPIS nylon sheath allows for stable and versatile carrying.
VIPERA Nitrogen (Stone Washed, HCS, Ranger Green)
This variant is designed for outdoor, survival, bushcraft, and prepping users: areas where reliability in the field, weather resistance, and maintainability are essential. Nitrogen steel maintains excellent edge retention, combined with excellent rust resistance and, above all, greater ease of resharpening compared to M390. The increased resilience makes these models more tolerant to the abuse typical of a field environment.Technical insight into nitrogen-added steels
Nitrogen steels, or nitrogen-added steels, are alloys in which nitrogen is used as an alloying element instead of, or in addition to, carbon. Although nitrogen is less effective than carbon in hardening the martensitic matrix, it has the advantage of forming stable compounds with chromium to a much lesser extent. This allows a greater amount of chromium to be kept in solid solution, improving corrosion resistance. In addition, nitrogen contributes to the hardness and stability of the structure, giving these steels a good balance between hardness, toughness, and corrosion resistance. Compared to traditional martensitic steels, nitrogen steels can therefore offer a better combination of mechanical properties and resistance to chemicals, while maintaining good workability and sharpenability characteristics.Intended use: Outdoor / Utility / Bushcraft
Type of production: Industrial
Country of production: Italy
Blade: nitrogen-alloyed stainless steel
Blade treatment: Stonewashed
Handle: Forprene
Blade length: 116mm.
Blade thickness: 4 mm.
Total length: 236 mm.
Weight: 95 g.
Sheath: ASPIS nylon with two multi-position clips, M.O.L.L.E. compatible.
Packaging: Cardboard box with Extrema Ratio logos.
Notes: -ER-VIP-SNG -
ExtremaRatio - Vipera - M390 Total Black - tactical knife
VIPERA is born from the fusion between the tactical and survival worlds, combining speed of use, robustness, and precision in a knife weighing less than 100 grams. Equipped with an elongated drop-point blade with a full flat grind and narrow edge, it offers penetration, smooth cutting, and hardness up to 61 HRC. It is available in two high-performance steels, both with excellent edge retention and corrosion resistance. The ergonomic handle with integrated guard ensures maximum control in all conditions, while the ASPIS nylon sheath allows for stable and versatile carrying.
VIPERA M390 (Total Black)
It is positioned as a specialist tool for tactical and operational use, where maximum hardness, extreme edge retention, and penetration are priorities. M390 steel (traditional martensitic with high chromium and vanadium content) is perfect for this: very high hardness (61 HRC), excellent edge retention, but typically more difficult to resharpen in the field and less tough than more ductile steels.
Intended use: Tactical / Multi-purposeType of production: Industrial
Country of production: Italy
Blade: M390 stainless steel hardened to 61HRC
Blade treatment: MIL-C-13924 burnishing
Handle: Forprene
Blade length: 116mm.
Blade thickness: 4 mm.
Total length: 236 mm.
Weight: 94 g.
Sheath: ASPIS nylon with two multi-position clips, M.O.L.L.E. compatible.
Packaging: Cardboard box with Extrema Ratio logos.
Notes: -ER-VIP-M390-TB -
Zero Tolerance - ZT0203 DuraLock - Black PVD CPM-M4 & Olive Green G10 - knife
Reliability without compromise
Take on even the most demanding tasks with the Zero Tolerance 0203, a rugged folding knife designed to last. Made in the USA, it combines extreme strength with a practical and functional design. With double thumbstuds, DuraLock lock and reversible pocket clip, it is fully ambidextrous and ready for any challenge.High-performance blade
The powerful drop point blade made of CPM M4 steel with black PVD coating provides exceptional edge retention, maximum hardness and wear resistance. Perfect for intensive use in the field, it is designed to deliver consistent performance over time.Reinforced construction
The center pivot bolt, visible all along the handle, adds strength to the knife's structure. It can be easily adjusted with a 5/16-inch combination wrench, allowing precise maintenance even in the field.Safety and control
The DuraLock locking system uses a hardened steel crossbar to keep the blade open safely. Locking is easy and secure with a knurled surface button built into the handle for a firm grip even with gloves on.Solid, grippy handle
The G-10 handle with 3D olive-colored textured surface provides a secure and comfortable grip. Under the grips, thick steel reinforcements further enhance the knife's overall strength, making it suitable for even the toughest jobs.Smooth and clean opening
The knife features phosphor bronze washers that promote a smooth opening, simplify cleaning and provide excellent mechanical support over time.Smart portability
The deep-carry pocket clip made of black Cerakote is fully reversible, allowing for discreet left- and right-handed carry. The tip-up orientation ensures its readiness for use.
Intended Use: Tactical / HikingType of production: Industrial
Country of manufacture: USA
Blade: Made of CPM-M4 carbon sintered steel at 60/62HRC
Blade Treatment: Black PVD
Handle: Black PVD steel folders with reinforced shims and olive green G10
Blade length: 102mm.
Blade thickness: 4.1mm.
Length closed: 133mm.
Total length: 235mm.
Weight: 187g.
Closure: DuraLock (Crossbar Lock / modified Axis Locx)
Clip: Removable and reversible, stainless steel treated, with Cerakote
Packaging: cardboard box with Zero Tolerance logos
Notes: opening system on phosphor bronze washersZT0203 -
ExtremaRatio - Requiem - Stonewashed M390 & Black Forprene - tactical knife
Extrema Ratio Requiem M390 is an extremely compact, lightweight and effective tactical knife designed for professional use in real-world operational settings. Weighing only 93 grams, it can be used both as a main blade and as a reliable backup knife.
The blade is made of Böhler M390 steel, heat-treated to 61 HRC. Thanks to a powder metallurgical process, this material ensures high cutting efficiency, excellent wear resistance and remarkable protection from oxidation. The profile is spear point type, with a fuller fuller that further lightens the blade and a false counterbore extended three-quarters of the length. The flat edge sharpening ensures precise and efficient cuts.
The forprene handle, featuring Extrema Ratio's classic ergonomic recesses, ensures a firm grip even under extreme operating conditions.
Requiem M390 comes with an ASPIS hard scabbard, compatible with the M.O.L.L.E. The two adjustable loops allow for secure and customizable installation. The tapered invitation design facilitates blade reinsertion, while the trigger safety allows for quick and instinctive drawing with a simple press.
Intended Use: Tactical/Multi-roleProduction Type: Industrial
Country of manufacture: Italy
Blade: M390 stainless steel hardened to 61HRC
Blade treatment: Stonewashed
Handle: Forprene
Blade length: 118mm.
Blade thickness: 4mm.
Total length: 238mm.
Weight: 93g.
Sheath: Nylon ASPIS with two multi-position clips, M.O.L.L.E. compatible.
Packaging: cardboard box with Extrema Ratio logos.
Notes: -ER-REQ-M390SW -
ExtremaRatio - Requiem - Black M390 & HCS Forprene - tactical knife
Extrema Ratio Requiem M390 is an extremely compact, lightweight and effective tactical knife designed for professional use in real-world operational settings. Weighing only 93 grams, it can be used both as a main blade and as a reliable backup knife.
The blade is made of Böhler M390 steel, heat-treated to 61 HRC. Thanks to a powder metallurgical process, this material ensures high cutting efficiency, excellent wear resistance and remarkable protection from oxidation. The profile is spear point type, with a fuller fuller that further lightens the blade and a false counterbore extended three-quarters of the length. The flat edge sharpening ensures precise and efficient cuts.
The forprene handle, featuring Extrema Ratio's classic ergonomic recesses, ensures a firm grip even under extreme operating conditions.
Requiem M390 comes with an ASPIS hard scabbard, compatible with the M.O.L.L.E. The two adjustable loops allow for secure and customizable installation. The tapered invitation design facilitates blade reinsertion, while the trigger safety allows for quick and instinctive drawing with a simple press.
Intended Use: Tactical/Multi-role
Production Type: Industrial
Country of manufacture: Italy
Blade: M390 stainless steel hardened to 61HRC
Blade treatment: Burnishing MIL-C-13924
Handle: Forprene
Blade length: 118mm.
Blade thickness: 4mm.
Total length: 238mm.
Weight: 93g.
Sheath: Nylon ASPIS with two multi-position clips, M.O.L.L.E. compatible.
Packaging: cardboard box with Extrema Ratio logos.
Notes: -ER-REQ-M390H -
ExtremaRatio - BF2CT knife - DLC M390 & Tactical Grey Anticorodal - knife
The blade of the BF2 CT M390 TACTICAL GREY, featuring a flat rounding and a particularly thick and durable drop tip, is coated with a Diamond-Like Carbon (DLC) surface treatment. This coating makes the blade extremely resistant to abrasion and chemical attack, ensuring optimal performance over time.
The steel used for the blade is Böhler M390, heat-treated to 61 HRC. Using a powder metallurgical manufacturing process, this steel offers high cutting efficiency, wear and oxidation resistance, making it an excellent choice for those seeking quality and durability.
The handle, in the new “Tactical Grey” coloring, is composed of 2 full gauntlets with characteristic lowered planes to engage the opening “pins” without them protruding from the profile of the closed knife. This design ensures a firm and comfortable grip, ensuring safe and convenient use.
Intended Use: Tactical/Military
Type of production: industrial
Country of Manufacture: Italy
Blade: stainless steel M390 at 61HRC
Blade finish: DLC (Diamond Like Carbon)
Handle: Anticorodal
Blade length: 87mm.
Blade thickness: 3mm.
Length closed: 124mm.
Total length: 213mm.
Weight: 142g.
Closure: Liner Lock
Clip: reversible and removable, burnished stainless steel
Notes: safety catch when knife is openER-BF2CT-TG -
Extrema Ratio - MH-STEALTH Knife - N690 Black & Anticorodal Tactical Mud - Tactical Folding Knife KSK
MH-STEALTH by Extrema Ratio is a cutting-edge tactical folding knife developed in collaboration with Kommando Spezialkräfte (KSK) operators and the Gemeinschaft Deutscher Kommandosoldaten.
Born from a freehand design, it has evolved into a compact, functional tool tailored for real operational use.
The name MH pays tribute to the professionals involved in its development, while "Stealth" emphasizes the knife’s concealment ability and extreme compactness.
Equipped with a Böhler N690 steel blade with MIL-C-13924 black coating and KSK logo engraving, it features a serrated section near the base for fast cutting through tough materials.
The locking mechanism is the reliable liner lock.
Its handle, made of anodized anticorodal aluminum in Tactical Mud color, includes a rear ring for a secure grip, a tungsten carbide glass breaker, and a safety belt cutter with a cutter-style blade.
The rigid ASPIS sheath allows safe carry in the open position, ideal for integration on plate carriers or MOLLE gear.
Alternatively, it can be carried closed in a pocket or directly on MOLLE systems, thanks to the absence of a blade pin.
Weighing only 106g, the MH-STEALTH is a hybrid between a fixed and a folding knife, suitable for both close combat and daily utility.
Intended use: Tactical/Military
Production type: Industrial
Country of manufacture: Italy
Blade: Böhler N690 steel (58 HRC)
Blade finish: MIL-C-13924 black coating
Handle: Anodized anticorodal aluminum, Tactical Mud color
Blade length: 86mm
Blade thickness: 3.6mm
Closed length: 107mm
Total length: 225mm
Closed thickness: -
Weight: 106g
Locking mechanism: Liner Lock
Clip: -
Packaging: MOLLE-compatible rigid ASPIS sheath
Notes: Tungsten carbide glass breaker integrated into the rear ring; safety belt cutter with cutter-style blade housed in the handle; KSK logo engraved on the blade.ER-MH-STEALTH -
ExtremaRatio - Estrema Axe - Dark Stone N690Co & Black G-10 - Emergency Breaching Tool
The axe has spanned history as a symbol of power, versatility, and innovation. From work tool to fearsome combat weapon, its evolution has accompanied ancient and modern civilizations.
Today, Extrema Ratio pays tribute to this tradition with Estrema, a tactical axe developed for the G.O.I. (Naval Operational Incursors Group), which blends state-of-the-art materials and functional design to meet the most extreme challenges.
Intended Use: Heavy Utility
Production type: Industrial
Country of manufacture: Italy
Blade: full tang in N690Co 54HRC stainless steel
Surface treatment: Dark Stone
Handle: G-10
Blade length: 80mm.
Blade thickness: 6.3mm.
Total length: 374mm.
Balance: advanced
Weight: 777g.
Sheath: kydex, MOLLE compatible
Packaging: technical, airtight, polymer case
Notes: -Millennial heritage, modern innovation.
From the earliest times, the axe has embodied a duality between work tool and combat tool, evolving over the years to become a symbol of power and versatility. Its use as a work tool dates back to 6,000 B.C., while the earliest documented war use is between 700 and 600 B.C. during Etruscan times, as certified by the Auvele Felùske stele at Vetulonia.
Throughout the world, from Europe to Ancient Egypt to the Far East, the battle axe has been distinguished by its immediate effectiveness in combat, requiring less complex training than other tools but providing decisive performance in close quarters situations. EXTREMA RATIO, an official supplier to the Comsubin, reinterprets this age-old tradition with ESTREMA, a tactical battle axe developed for the G.O.I. (Naval Operational Incursors Group).
With a state-of-the-art design, ESTREMA combines the strength and speed of the historic weapon with technological innovation, offering a versatile and reliable tool for the most demanding missions. Suitable as both a tactical combat tool and a breacher tool, ESTREMA is designed to meet any challenge. The name “ESTREMA” expresses the nature of this model: our most extreme product, the result of our boldest manufacturing experience.
ESTREMA is made of Böhler N690 steel with 54 HRC hardness and dark stone finish. The G10 material handle offers two modes of use: grasping the end section of the handle provides the traditional grip, while a narrower grip encourages close use. The tang, in its end section, can be used as a burglary tool and for cutting and opening metal sheets. In addition, the tapering allows the axe to be used as a lever or crowbar.
ESTREMA can be equipped with a hammer (hammering mass) made of hardened and tempered carbon steel, which engages and disengages from the axe's pike via a snap mechanism with a safety catch to prevent accidental disengagement. This solution, the first of its kind applied in this context, makes the axe even more versatile. The rear hammer is an optional accessory that can be purchased separately.
ESTREMA comes in an innovatively designed airtight technical case, inside of which is also a Kydex sheath and belt clip.
The Kydex sheath, which is ambidextrous, is designed to offer different carrying modes and provide numerous interface options with the operator's equipment. It can be clipped to the belt using the belt clip included in the case, or attached to any MOLLE-equipped platform using a paracord lanyard. Axe retention is ensured by the natural conformation and elasticity of Kydex, supported by a lanyard secured with snaps.
ER-ESTR-AXE -
ExtremaRatio - T911 Rescue - Stone Washed N690Co & Red Anticorodal - folding knife
The T911 Rescue is a medium-sized, lightweight folding knife designed for professional use by military operators. This model was made to commemorate the 80th anniversary of the Tuscania Parachute Regiment.
Key Features.
Blade:
Modified spear point type with flat edge.
Made of Böhler N690 cobalt steel, heat-treated to a hardness of 58 HRC.
Length of 76 mm and thickness of 4 mm, with a stone washed finish.
The opening mechanism has an adjustable pivot to ensure smooth blade rotation, with a counter-screw for locking in optimal position.Handle:
Made of Anticorodal aluminum alloy with a high-strength black anodized finish.
Ergonomic design that facilitates the transition from a “reverse grip” to a saber grip.
Blade opening via a thumb-operated pin.
Intended Use: Tactical/EmergencyProduction type: Industrial
Country of manufacture: Italy
Blade: Stainless steel N690Co 58HRC
Blade treatment: Stonewashed
Handle: Anticorodal
Blade Length: 76mm.
Blade thickness: 4mm.
Length closed: 118mm.
Total length: 194mm.
Thickness when closed: 24mm.
Weight: 145g.
Closure: Liner Lock
Clip: Stainless Steel
Packaging: black cardboard box with Extrema Ratio logos
Notes: belt cutter, glass breaker, optics screwdriver, stainless steel knot dissolverER-T911-RE -
Zero Tolerance - 0004 Fixed Knife - Dark Bronze Cerakote CPM-CruWear & Brown Micarta - knife
The 0004 knife is a true working companion, designed to take on the toughest outdoor and bushcraft challenges without difficulty. Its clip-point blade is made of CPM Cru-Wear steel, a high-quality material that offers strength and ease of sharpening even in the field. The blade, with a dark bronze Cerakote coating, not only protects the knife but also improves its wear resistance.
The handle, made of natural canvas micarta, is designed with 3D machining to fit the hand perfectly, providing optimal control during use. In addition, with the use of a hex wrench, the knife can be easily disassembled for deep cleaning, revealing the steel tang, ready to be customized with an arachord webbing.
The 0004 comes with a magnificent vegetable-tanned leather sheath, handcrafted in Kansas, allowing it to be worn in a variety of configurations, either on the belt or scout style.
With a design that combines functionality and quality materials, the 0004 is ready to become the perfect ally for your every outdoor adventure.
Intended Use: Outdoor / BushcraftProduction type: Industrial
Country of manufacture: USA
Blade: CPM-CruWear steel at 63/65HRC
Blade treatment: Dark Bronze Cerakote protective treatment
Handle: natural canvas micarta, 3D machined
Blade length: 107mm.
Blade thickness: 4mm.
Total length: 229mm.
Weight: 170g.
Sheath: handcrafted, reinforced vegetable-tanned leather, with multi-position belt attachment
Packaging: cardboard box with Zero Tolerance logos.
Notes: -ZT0004 -
Zero Tolerance - ZT0044 Button Lock Knife - Dual Tone CPM-S45VN & Titanium - knife
Zero Tolerance's Model 0044 is a functional sports knife with a clean and elegant design, featuring a smooth and durable button lock mechanism.
The CPM-S45VN steel blade offers exceptional edge retention and corrosion resistance, with a dual satin and stonewashed finish that highlights the sinuous bevels of the blade.
The lightweight and ergonomic titanium handle is enhanced by details such as a turquoise anodized button collar and a titanium spacer, also turquoise anodized. The KVT ceramic ball bearing opening system allows smooth opening, while the black Cerakote clip is reversible for left- or right-handed carry.
Intended Use: Sporty / CollectionType of production: Industrial
Country of manufacture: USA
Blade: Stainless steel CPM-S45VN
Blade treatment: double finish, satin-finished and stonewashed
Handle: titanium
Blade length: 81mm.
Blade thickness: 3.1mm.
Length closed: 110mm.
Total length: 192mm.
Weight: 96g.
Closure: button lock
Clip: Removable and reversible, stainless steel treated with Cerakote
Packaging: cardboard box with Zero Tolerance logos
Notes: opening system on KVT ceramic ball bearingsZT0044 -
Zero Tolerance - 0450CFDAMS by Sinkevich - Damascus & Multilayer Carbon Fiber - Sprint Run - knife
Zero Tolerance offers an elegant and refined alternative to the original 0450, with an added touch of style.
This sophisticated ZT is a compact version of the ZT family, but does not give up a sturdy combination of high-quality materials. The blade is made of Vegas Forge stainless damascus steel, known for its exceptional strength, edge-holding ability and durability. The acid-waxed finish of the blade enhances the beautiful patterns typical of damascus steel that we all appreciate.
The front of the handle is made of multilayer carbon fiber, which balances solid construction with lightness for comfortable use. The stonewashed titanium back of the handle features a secure frame lock mechanism for a stable and reliable grip.
The 0450CFDAMS takes advantage of ZT's KVT ball-bearing opening system for smooth and easy opening, suitable for both left- and right-handed users. A reversible deep-carry clip completes the 0450CFDAMS' set of key features.
Intended Use: EDC/Sporting/Collection
Production Type: Industrial
Country of manufacture: USA
Blade: Stainless damascus steel by Vegas Forge
Blade Finish: Acid-waxed finish
Handle: Multilayer Carbon Fiber and Stonewashed Titanium
Blade length: 82mm.
Blade thickness: 3mm.
Length closed: 111mm.
Total length: 187mm.
Weight: 68g.
Closure: Frame Lock
Clip: Removable, multi-position, stainless steel
Packaging: cardboard box with Zero Tolerance logos
Notes: Sprint Run limited edition, not numbered - Design by Dmitry Sinkevich - KVT opening on ball bearingsZT0450CFDAMS -
Zero Tolerance - ZT0235 SlipJoint by Jens Anso - CPM-20CV & Green G10 - Sprint Run - knife
From renowned Danish designer Jens Anso, the ZT 0235 is an evolution of the 0230 model, offering premium performance in a top class knife. The spear point blade features a double detent system, which ensures secure blade closure during transport and a second detent position at mid-opening for controlled opening and closing. Made of CPM-20CV steel, the blade offers exceptional wear resistance and long-lasting sharpness. Its chromium content, among the highest among high-vanadium steels, also gives it outstanding corrosion resistance. You'll also notice that the knife does not feature the logo on the blade-ZT chose to place it on the back to keep the aesthetic clean and minimalist.
The G10 handle makes this knife extremely water-resistant and easy to carry. The orange anodized backspacer features an integrated lanyard attachment. Unique features and Anso's signature clean design make the ZT 0235 a simple yet outstanding knife.
Intended Use: EDC / Gentleman
Type of production: Industrial
Country of manufacture: USA
Blade: Stainless steel CPM-20CV
Blade treatment: Stonewashed
Handle: G10 with stainless steel folders and anodized aluminum spacer
Blade length: 66mm.
Blade thickness: 3.1mm.
Length closed: 97mm.
Total length: 160mm.
Thickness when closed: 10mm.
Weight: 51g.
Closure: SlipJoint
Clip: stainless steel, deep pocket type
Packaging: cardboard box with Zero Tolerance logos
Notes: Sprint Run edition made in limited edition, not numbered - Design by Jens AnsoZT0235OLG10 -
ExtremaRatio - Selvans - S600 Black - Heavy Utility Survival Knife - knife
The Selvans S600 Black is a survival knife with total black design, made of Böhler S600 steel with hardness of 64 HRC. Powered by the excellent properties of this steel, it is designed to cope with extreme environments and outdoor operations such as cutting branches and building shelters.
Created through a collaboration between Extrema Ratio and AIGS guide Daniele Dal Canto, Selvans has gained notoriety for its versatility and toughness. The 160 mm, 6.3 mm thick blade is ideal for chopping and batoning operations, providing excellent performance even under heavy loads.
The black forprene handle ensures a secure grip, even with wet hands or gloves. Böhler S600 steel, used in industrial tools, offers wear resistance and holds the edge for a long time thanks to cryogenic treatment and 64 HRC hardness. The EXP DARK coating protects the blade from oxidation, while the Cordura thigh sheath with MOLLE system allows for convenient carrying.
Perfect for hiking, bushcraft and survival situations, the Selvans S600 Black is the ideal companion for any outdoor adventure.
Intended Use: Survival / Heavy Utility
Production Type: Industrial
Country of Production: Italy
Blade: 64HRC Bohler S600 carbon steel
Blade finish: EXP DARK coating
Handle: Forprene
Blade length: 160mm.
Blade thickness: 6.3mm.
Total length: 312mm.
Balance: advanced
Weight: 407g.
Sheath: cordura, M.O.L.L.E. compatible.
Packaging: cardboard box with Extrema Ratio logos
Notes: designed and developed through collaboration with instructor Daniele del CantoER-SEL-S600B -
Extrema Ratio - Tuscan Knife - Black S600 64HRC & Green G10 - Knife
The Tuscan S600 Black by Extrema Ratio is a high-end tactical knife designed to deliver outstanding performance in complex operational scenarios. Crafted from Böhler S600 steel, cryogenically tempered to 64 HRC, it provides unparalleled hardness and wear resistance, ensuring a sharp cutting edge for longer. The EXP DARK finish protects the blade from oxidation, making it more durable even in extreme environmental conditions.
The lightweight full tang construction optimizes the knife’s balance, shifting the weight toward the tip to maximize efficiency in chopping and batoning operations. The handle, made of G10 with ergonomic scales, ensures a firm and comfortable grip, both with gloves and bare hands. The green Cordura sheath, M.O.L.L.E compatible, guarantees versatile and secure transport.
Designed for tactical and military use, the Tuscan S600 Black is the ideal companion for professional operators and survival and bushcraft enthusiasts looking for a reliable, durable, and high-performance knife.
Intended use: Tactical / Military
Production type: Industrial
Country of manufacture: Italy
Blade: Full tang, Böhler S600 steel (64 HRC)
Blade finish: EXP DARK (MIL-C-13924 coating)
Handle: G10, ergonomic with Extrema Ratio design
Blade length: 167mm
Blade thickness: 6mm
Overall length: 306mm
Weight: 449g
Locking mechanism: -
Clip: -
Sheath: Cordura, MOLLE compatible, with thigh strap
Packaging: Cardboard box with Extrema Ratio logos
Additional notes: Tang can be used as a glass breakerER-TUS-S600B -
ExtremaRatio - Pugio SE Desert Warfare - Single-Edge Version - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased.
* Condition: Like new, never used
* Commercially available: Discontinued
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present and complete
* Scabbard: Present
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
PUGIO: The name evokes the historic Roman dagger, but the handle, with its tapered cuttlebone-like shape, also recalls the elegance of Caucasian daggers.Compact and sharp, this boot dagger is designed as a backup weapon, ideal for defense and perfect for those seeking discretion and portability. The blade, sharpened only on one side, ensures lethal accuracy, while the absence of guards prevents any risk of entanglement in close, high-intensity combat. The rigid scabbard with automatic engagement system and Tek-Lok type attachment allows for unique versatility: it can be positioned horizontally, vertically or tilted at a 45-degree angle, easily adapting to any requirement.
Intended Use: Tactical / CQCProduction type: Industrial
Country of production: Italy
Blade: stainless steel N690Co 58HRC
Blade treatment: Desert Warfare
Handle: Forprene
Blade length: 110mm.
Blade thickness: 6.5mm.
Total length: 225mm.
Weight: 190g.
Sheath: made of ABS, rigid, with Tek-Lok type attachment
Packaging: cardboard box with Extrema Ratio logos
Notes: Single edge versionER-PUGIODW-CP













































































