Neck Knives: your reliable daily companion
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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€176.23Only 4 leftOnly 4 left
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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€340.16Only 1 leftOnly 1 left -
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€176.23Only 1 leftOnly 1 left -
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€184.43Only 1 leftOnly 1 left -
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€184.43Only 1 leftOnly 1 left -
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€184.43Only 1 leftOnly 1 left -
ExtremaRatio - N.K.3 Karambit Desert Warfare - Neck Knife - NK3K - knife
NK3 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the models NK1 and NK2 for the largest size of the blade-type "long" 70mm. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.
The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Desert Warfare
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 70mm.
blade thickness: 6.3mm.
total length: 172mm.
Weight: 95g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)12636€172.13Only 1 leftOnly 1 left -
ExtremaRatio - N.K.3 Karambit Black - Neck Knife - NK3K - knife
NK3 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the models NK1 and NK2 for the largest size of the blade-type "long" 70mm. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.
The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Black PVD cat. MIL-C-13924
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 70mm.
blade thickness: 6.3mm.
total length: 172mm.
Weight: 95g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)ER-NK3K-BK€170.49Only 1 leftOnly 1 left -
ExtremaRatio - N.K.3 Desert Warfare - Neck Knife - NK3 - knife
NK3 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the models NK1 and NK2 for the largest size of the blade-type "long" 70mm. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.
The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Black PVD cat. MIL-C-13924
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 70mm.
blade thickness: 6.3mm.
total length: 153mm.
Weight: 82g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)ER-NK3-DW€146.72Only 1 leftOnly 1 left -
ExtremaRatio - N.K.3 Black - Neck Knife - NK3 - knife
NK3 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the models NK1 and NK2 for the largest size of the blade-type "long" 70mm. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.
The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Black PVD cat. MIL-C-13924
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 70mm.
blade thickness: 6.3mm.
total length: 153mm.
Weight: 82g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)ER-NK3-BK€142.62Only 1 leftOnly 1 left -
ExtremaRatio - N.K.3 Stone Washed - Neck Knife - NK3 - knife
NK3 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the models NK1 and NK2 for the largest size of the blade-type "long" 70mm. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.
The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Stone Washed
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 70mm.
blade thickness: 6.3mm.
total length: 153mm.
Weight: 82g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)12450€132.79Only 1 leftOnly 1 left -
ExtremaRatio - N.K.2 Black - Neck Knife - NK2
NK2 is a small knife that extends the family of the Extrema Ratio neck knives.
It differs from the model NK1 for blade tip tanto styled and for the increased thickness. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or forefinger depending on use. The structure enables both use for very effective cutting work or for small precision work.The quick release Kydex sheath is supplied with paracord for carrying on the neck.
Intended use: Neck Knife
Type of production: Industrial
Production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Black PVD cat. MIL-C-13924
Handle: stainless steel N690Co 58 / 60HRC
Blade length: 50mm.
Blade thickness: 6.3mm.
Total length: 129mm.
Weight: 69g.
Sheath: Kydex, neck
Package: Cardboard box with Extrema Ratio logo
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)ER-NK2-BK€129.51Only 99 leftOnly 99 left -
ExtremaRatio - N.K.2 Stone Washed - Neck Knife - NK2
NK2 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the model NK1 for blade-type "time" and for the increased thickness. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Stone Washed
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 50mm.
blade thickness: 6.3mm.
total length: 129mm.
Weight: 69g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)ER-NK2-SW€123.77Only 1 leftOnly 1 left -
Boker - Bud Nealy MCS Cocobolo Knife - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: Like New
* Commercially available Discontinued
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: None
* Box: Present - Original
* Scabbard: Present - Original, with all accessories included.
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
Intended Use: Tactical / Neck Knife / CQD
Country of Production: Germany
Blade: full tang in 440C 58/60HRC stainless steel
Handle: cocobolo wood
Blade length: 85mm.
Blade thickness: 3mm.
Total length: 185mm.
Balance: Backward
Weight: 90g.
Clip: MCS2 System that allows 9 different carry options, all explained in the manual
Sheath: Ultra flat Kydex sheath with additional magnetic retention
Notes: knife withdrawn from private collection, like new
Biographical Note:
Bud Nealy is universally recognized as one of the best knifemakers in the world. He is also known as the inventor of the MCS (Multi Concealment Sheath) system that allows the knife to be placed securely in any type of position. And it is because of these two requirements that every day hundreds of his MCS systems are used by police officers, undercover agents, S.W.A.T. and R.A.I.D. members, U.S. embassy guards, Bodyguards and Air Rangers.BO-BNMCS-CP€0.00Only 0 leftOnly 0 left
Out of stock -
ExtremaRatio & Knives.it - Tengu Tactical - Icepick Karambit - knife
THE BRAND
Exclusive collaboration between Coltelleria Collini and Extrema Ratio marketed under the brand KNIVES.IT.TECHNICAL DATA SHEET
Intended Use: Collection / Tactical / Neck knife
Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58/60HRC
Blade finish: Black PVD cat. MIL-C-13924
Handle: Stainless steel N690Co 58/60HRC
Blade length: 40mm.
Blade thickness: 5.5mm.
Total lenght: 166mm.
Weight: 86g.
Sheath: optional (available separately) in Kydex, handcrafted by the Italian Knife Maker Simone Tonolli.
Package: cardboard box with Extrema Ratio logos
Notes: knife created and manufactured by Extrema Ratio - each knife is numbered - Design by LoTacticalHISTORY
The Tengu takes its name from a mythical creature of Japanese folklore that is represented with both human and raven features, they had the reputation of being great warriors and legends say that some founders of martial arts were trained by them.- It is designed to be used in many different grips, but is especially effective in the reverse grip.
- Designed to be carried in a variety of ways, whether as a neck knife, under shirt, clipped in a pocket or around the waist using optional systems such as Ulti-Clip or Tek-Lok or various M.O.L.L.E. type attachments.
- With its thickness of 5.5 mm. is extremely robust and thanks to the shape of the handle is comfortable even by those with large hands or those who want to use it with tactical gloves.
- The blade is compact, robust and very functional for both precision cutting and hard materials thanks to the serrated part on the back. The tanto-shaped tip is very robust and optimal for engraving work.ER-TENGU€0.00Only 0 leftOnly 0 leftOut of stock -
ExtremaRatio - N.K.3 Karambit Stone Washed - Neck Knife - NK3K - knife
NK3 is a small knife that extends the family of the neck knives Extrema Ratio.
It differs from the models NK1 and NK2 for the largest size of the blade-type "long" 70mm. The ergonomic grip is designed so as to prevent accidental cuts during withdrawal from the scabbard.
On the back it is formed a drain for the positioning of the thumb or index depending on use. The structure enables both use for work or cutting very effective for small precision work.
The Kydex sheath is a quick release and is supplied to the port of paracord knife in his neck.
intended use: Neck Knife
type of production: Industrial
production country: Italy
Blade: stainless steel N690Co 58 / 60HRC
Blade treatment: Stone Washed
manicatura: stainless steel N690Co 58 / 60HRC
blade length: 70mm.
blade thickness: 6.3mm.
total length: 172mm.
Weight: 95g.
Sheath: Kydex, neck
Package: Cardboard box with logos Extrema Ratio
Notes: possibility of using the sheath with MOLLE systems or Tek-Lok (not included in the package)ER-NK3K-SW€163.93Only 0 leftOnly 0 leftOut of stock -
Quartermaster - ALF-1 - Titanium Neck Knife
Intended use: Tactical / Neck
Type of production: Industrial
Production Blade: 100% USA
Blade: Titanium Beta
Treatment Blade: -
Handle: -
Blade length: 50mm.
Blade thickness: 4mm.
Total length: 76mm.
Thick when closed: -
Balancing: -
Weight: 18g.
Closure: -
Clip: -
Sheath: Kydex, thermoformed vacuum neck
Packaging: Cardboard box with logos Quartermaster
Notes: -10958€81.97Out of stock -
Chris Reeve - Professional Soldier by W. Harsey - Tanto - 2017 Version - knife
Use target: Neck Knife / Sportsman / Tactical
Type of production: semi-industrial
Country of production: Boise - Idaho - USA
Blade: Stainless steel CPM-S35VN 55 / 57HRC
Surface treatment: PVD
Handle: Stainless steel CPM-S35VN 58 / 59HRC
Blade Length: 86mm.
Blade thickness: 4.2mm.
Total length: 184mm.
Weight: 85g.
Sheath: in Kydex, ultra-thin
Packing: white cardboard box with Chris Reeve logos, Warranty Certificates
Notes: Design by William W. HarseyPRO-1002€0.00Only 0 leftOnly 0 left
Out of stock
