Knife - Essential Tool for Camping, Outdoor Adventure and collection

T4000 S Ranger Limited Edition is a limited series version of only 100 pieces based on the T4000 model, a reworking of the Japanese Wakizashi short sword that the Samurai carried at all times in contact with the body.

It is a timeless tactical tool that follows no fashion but faithfully adheres to the Extrema Ratio philosophy aimed at fulfilling all functional requirements.

This model continues Extrema Ratio's purest Tanto series designed especially for lovers of the Japanese blade profile, who do not want to give up typical tactical accessories such as textile sheath and special polymer handle.

The blade, made of Böhler N690 steel hardened to 58 HRC and burnished to MIL - C- 13924, features Geotech Camo customization, Extrema Ratio's innovative and original camouflage pattern made by laser engraving.

The grip, in HCS coloring, is made of Forprene, an elastomer that is part of the "NATO standard" due to its exceptional resistance to extreme conditions.

The black-colored Cordura sheath is and equipped with MOLLE system that allows its carrying on tactical vests and general belts and guarantees the safe carrying of the razor-sharp blade by protecting it from shocks that could reduce its efficiency.

The T4000 S Ranger Limited Edition comes in an IP67-certified watertight Polypropylene technical case with pressurization valve that is weather, dust and shock resistant. Also inside is a double-grit sharpening plate (ceramic abrasive and synthetic diamond) and a metal plaque with the numbering of the limited series of 100.


Intended Use: Tactical/Collection

Type of production: Industrial
Country of Production: Italy
Blade: Bohler N690Co stainless steel at 58HRC
Blade Finish: Burnishing MIL-C-13924 with Geotech pattern
Handle: Forprene
Blade length: 174mm.
Blade thickness: 4mm.
Total length: 304mm.
Weight: 264g.
Sheath: Nylon
Packaging: Polymer case, diamond and ceramic sharpener, Limited run of only 100 pieces

Discover the new Mcusta Damascus Tanto: a knife that combines the timeless elegance of traditional Japanese blades with top-tier modern performance.

Crafted from SPG-2 Powdered High Speed Tool Steel, it offers exceptional sharpness and superior edge retention. The Damascus blade, with a matte gray finish and hammered texture (tsuchime), immediately catches the eye and evokes authentic Japanese craftsmanship.

The handle, inspired by classic Japanese swords, is made of genuine stingray leather covered in black leather with a tsuka-maki-style wrap: a choice that blends tradition and innovation, ensuring a secure, stable, and comfortable grip. The full-tang construction guarantees strength and durability, while the perfect balance gives you total control in every use.

It is not just a knife, but a true piece of character, where precision and the samurai spirit meet.

Intended use: Collectible / Sport

Production type: industrial
Blade: full tang in laminated Damascus steel, with a central core of SPG2 at 61/62 HRC and outer layers of R-2
Blade finish: hammered (Tsuchime)
Country of manufacture: Japan
Handle: genuine stingray leather (Samekawa) grip with Tsuka-Maki leather wrapping (Tsuka-Gawa)
Blade length: 160mm.
Blade thickness: 4.2 mm.
Overall length: 285 mm.
Weight: 215 g.
Sheath: leather, belt-mounted, for vertical carry
Packaging: box made of Paulownia wood, with manufacturer’s logos
Notes: -

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased
* Condition: Knife from 2018 in excellent overall condition, never used for cutting, has very small spots of oxidation on the blade that do not compromise its practical use in any way
* Available on the market: Model out of production and no longer available on the market
* Sharpness: Factory sharp
* Marks on blade: Very small signs of oxidation that do not compromise its use
* Marks on handle: None
* Box: Present and complete
* Sheath: -
* Manuals, Certificates, and Warranties: Present
* Checked and Certified by our internal laboratory

Intended use: Tactical/Collection

Type of production: MidTech
Country of production: USA
Blade: D2 steel 
Blade finish: Tumbled & Satin
Handle: full titanium
Blade length: 95mm.
Blade thickness: 5mm.
Total length: 227mm.
Thickness when closed: 13mm.
Weight: 254g.
Closure: Frame Lock
Clip: removable, titanium, with tumbled finish
Packaging: tactical polymer case with Medford logos, cardboard outer box, certificates, and warranties
Notes: discontinued model, produced in 2018, previously purchased and from a private collection

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased
* Condition: Like new, never used
* Available on the market: Difficult to find / Made to order
* Sharpness: Factory sharp
* Marks on blade: None
* Marks on handle: None
* Box: Nylon pouch with zip
* Sheath: /
* Manuals, Certificates, and Warranties: /
* Checked and certified by our in-house laboratory

Intended use: collection/sport/military

Type of production: MidTech
Country of production: South Africa
Blade: CPM S35VN steel
Blade treatment: Satin
Handle: titanium and G10
Blade length: 103mm.
Blade thickness: 4.5mm.
Closed length: 132mm.
Total length: 234mm.
Closed thickness: 14mm.
Balance: on the guard
Weight: 168g.
Opening: Carson Flipper type, on ball bearings
Locking Mechanism: FrameLock with additional slider safety
Clip: titanium, machined from solid
Packaging: Cordura case with ADV Tactical logos
Notes: Previously purchased knife from a private collection

NEW STRUCTURE: Full Tang
NEW GEOMETRY: Greater Control
NEW HANDLES: Black G10

The Harpoon F EVO, limited to only 150 numbered pieces, is the functional evolution of a tried and tested design. It retains the identity of the original Harpoon, but refines its ergonomics, structure, and balance for real and continuous use.

The full tang construction, G10 scales, and updated geometry offer greater control and solidity, while the 6.3 mm Böhler N690 blade guarantees reliability, penetration, and cutting precision.

The EVO finish completes a knife designed for operational use, advanced survival, and knowledgeable collectors.

Intended use: Tactical / Collectible

Type of production: Industrial
Country of production: Italy
Blade: full tang in N690Co steel
Blade treatment: Anti-reflective burnishing with EVO finish
Handle: Black G10 with CNC machining
Blade length: 209 mm.
Blade thickness: 6.3 mm.
Total length: 340 mm.
Weight: 442 g.
Sheath: Thigh sheath, reinforced Cordura
Packaging: Cardboard box with Extrema Ratio logos and Limited Edition plaque with progressive knife numbering
Notes: Limited edition, numbered to only 150 pieces worldwide

Italian handmade knife designed for versatile, everyday use.

The full tang blade in D2 steel with Stone Edge finish guarantees reliability and character, while the G10 handle offers a secure grip in all conditions.

Sturdy, well-balanced, and compact, it comes with a M.O.L.L.E.-compatible Kydex sheath and certificate of authenticity. A unique piece, handmade with care and attention to detail.

Use: Light Utility / All Round

Type of production: Handcrafted
Country of production: Italy
Blade: full tang, D2 steel at 59/61HRC
Blade finish: Raw
Handle: G10
Blade length: 100mm.
Blade thickness: 5.5mm.
Total length: 203mm.
Balance: rearward
Weight: 225g.
Sheath: Kydex, thermoformed, with M.O.L.L.E. compatible belt attachment.
Packaging: accompanied by warranty and authenticity certificate.
Notes: handmade knife.

LIMITED EDITION CARRY BOX

– BFK EVO Limited Edition
The BFK EVO is a compact folding knife designed as Extrema Ratio's flagship product for the EDC world. Produced in a limited series of 500 pieces, it is available exclusively in THE CARRY BOX. Extrema Ratio's build quality is evident in every detail: mechanical precision, selected materials, proven ergonomics, ease of handling, concealability, quick opening, and the proverbial reliability that has distinguished the brand for over 30 years. From the very first glance, it conveys a feeling of uncompromising strength and solidity.

Main features:

* Nitrogen steel blade with Tanto profile and reinforced tip, stone-washed finish.
* Black anodized aluminum scales, sturdy and compact for easy everyday carry.
* Crossbar lock for exceptional safety.
* Bearing system that guarantees quick, smooth, and natural opening.
* Customized lanyard on the tang for immediate extraction and improved grip.
* Dedicated laser engraving on the blade and clip that identifies the limited series.

BFK EVO is not an object to be shown off: it is a tool designed to be carried every day.

Intended use: EDC / Sports

Type of production: industrial
Country of production: Italy
Blade: Nitrogen stainless steel
Blade finish: Stonewashed with custom engravings
Handle: Anticorodal aluminum alloy
Blade length: 71mm.
Blade thickness: 2.5mm.
Closed length: 99mm.
Total length: 166mm.
Weight: 84g.
Locking Mechanism: Crossbar Lock
Clip: stainless steel, deep pocket type; reversible, removable, with custom engravings
Notes: Limited edition, numbered to only 500 pieces worldwide - Knife available for purchase only on this occasion and together with the Carry Box

– Extrema Ratio Essential Cap
Baseball cap with an elegant, urban design. Made of sturdy, breathable fabric, it features a silicone patch with the Extrema Ratio logo, an instantly recognizable symbol of belonging.

– Leather Zip Wallet
Black leather wallet with three-sided zipper closure and lanyard hook, ideal for preventing accidental loss. Designed to hold everything you need (cards, bills, etc.), it is a durable and reliable accessory, perfect for everyday use.

– Carbon Fiber Card
Compact carbon fiber tool with a sharp lower edge, useful in emergency or self-defense situations. It is the size of a credit card and fits into the Extrema Ratio wallet. A side recess facilitates proper grip for maximum effectiveness.

The idea behind the Sebenza has never wavered: to create the best pocket knife in the world.  

Premium materials, fine finishes, and a safety locking system, all in an incredibly light and precise tool. This commitment continues with the new Sebenza 31 with ceramic ball interface.  

Like the first Sebenza, it offers the same warm “click” and heirloom quality produced with aerospace tolerances.  The Sebenza 31 adds more refined details to an already very capable knife, taking another steady and reliable step forward.

Intended use: Collectible/Sporting

Type of production: MidTech
Country of production: USA
Blade: CPM MagnaCut steel at 63/64HRC
Blade finish: Stonewashed
Handle: Micro-peened 6AL4V titanium with blackened oak wood inserts
Blade length: 91.7mm.
Blade thickness: 3 mm.
Closed length: 122 mm.
Total length: 213.5 mm.
Weight: 133g.
Lock: Frame Lock
Clip: Microblasted 6AL4V titanium
Packaging: Cardboard box with Chris Reeve logo, fluorinated grease, threadlocker, disassembly tool, microfiber cloth, manuals, and warranty certificate.
Notes: -

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased
* Condition: Overall in excellent condition, a few imperceptible scratches on the titanium bolsters and a couple of small scratches on the satin finish of the blade
* Available on the market: Out of production
* Sharpness: Factory sharp
* Marks on blade: a couple of small scratches
* Marks on handle: a few imperceptible scratches on the titanium bolsters
* Box: Present and complete
* Sheath: -
* Manuals, Certificates, and Warranties: -
* Checked and Certified by our in-house laboratory

The Cold Steel Hatamoto Custom Series is a high-end folding knife designed for those seeking excellence, performance, and design inspired by samurai tradition.

Produced in a limited edition between 2005 and 2010, this model combines Japanese craftsmanship with American ruggedness with a San Mai III blade, famous for its extraordinary sharpness and superior durability. The enhanced profile ensures effective penetration and superior strength, while the textured G-10 handle with titanium liners and bolsters provides comfort, a secure grip, and a refined aesthetic.

The solid liner lock ensures reliable closure, making this knife not only a collector's item but also a reliable tool for everyday use. Today, the Hatamoto Custom is a rare and coveted item, combining functionality and prestige in a single extraordinary knife.

Intended use: Sports / Collection

Type of production: industrial
Country of production: Japan
Blade: SanMai III laminated stainless steel with VG1 cutting edge
Blade finish: Satin
Handle: Titanium bolsters and scales with three-dimensionally machined G10 grips
Blade length: 100mm.
Blade thickness: 4mm.
Closed length: 125mm
Total length: 229mm.
Weight: 181g.
Lock system: Liner lock
Clip: Removable and reversible, mirror-polished stainless steel
Packaging: Aluminum box with Cold Steel logos and cardboard outer box with “Cold Steel Custom Series” logos
Notes: Previously purchased knife from a private collection

MCUSTA MC-0241GD Tanto SPG2/R2 Damascus - Fixed Japanese Knife

The MCUSTA MC-0241GD is a high-end fixed knife inspired by traditional Seki swords, crafted with Japanese craftsmanship. This exclusive model combines classic aesthetics with modern materials, offering a perfect balance between beauty and functionality. The SPG2/R-2 laminated damascus steel blade provides exceptional cutting performance, while the Japanese-style tsuka-gawa breed and woven leather handle ensures a secure and comfortable grip. Packaged in an elegant paulownia wood box, it is ideal for collectors and enthusiasts of high-quality knives.

Intended Use: Collector/Sportsman

Type of manufacture: industrial
Blade: full tang in rolled damascus steel, with a 61/62HRC SPG2 core and R-2 outer cheeks
Blade finish: hammering (Tsuchime)
Country of manufacture: Japan
Handle: genuine Breed leather handle (Samekawa) with leather weave (Tsuka-Gawa)
Blade length: 135mm.
Blade thickness: 4.2mm.
Total length: 265mm.
Balance: on the guard branch
Weight: 195g.
Sheath: leather, belt, for vertical carry
Packaging: box made of Paulownia wood, with manufacturer's logos
Notes: -

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: 2011 specimen, overall in very good condition.
* Commercially available: Still in catalog, but difficult to find.
* Sharpening: Factory.
* Marks on blade: None
* Marks on handle: minimal marks given by time.
* Box: Present
* Scabbard: Present
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory

Intended Use: Collection / Sporting

Production type: Midtech
Country of manufacture: Sakai - Japan
Blade: ZDP189 stainless steel at 66.3 HRC
Blade treatment: mirror polish
Handle: Aluminum A6063S with anodization to Hv400 hardness and genuine Breed leather inserts
Blade length: 82mm.
Blade thickness: 3.7mm.
Length closed: 111mm.
Total length: 189mm.
Thickness when closed: 16.2mm.
Weight: 133g.
Opening: via ambidextrous pin 
Washers: steel
Closure: Sub FrameLock of 2mm. made of SUS402J2 stainless steel at 50HRC
Clip: deep pocket, 1mm. 420J2 stainless steel with PVD treatment
Packaging: wooden box with Rockstead logos, certificate with serial number and steel hardness test
Notes: Specimen number #046 dated 07/13/2011, previously purchased, withdrawn from a private collection

KNIFE WITHDRAWN FROM A PRIVATE COLLECTION
* Origin: Withdrawn from a private individual, previously purchased
* Conditions: in like-new condition
* Available on the market: No longer available
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: None
* Box: /
* Sheath: /
* Manuals, Certificates and Guarantees: Yes
* Checked and Certified by our internal laboratory

Intended use: Heavy Duty / Hiking / Tactical / Collection

Type of production: handcrafted blade and handle

Country of production: Italy
Blade: D2 steel at 59/61HRC with cryogenic hardening
Blade treatment: Raw
Handle: titanium folders with handle in micarta
Blade length: 90mm.
Blade thickness: 5mm.
Closed length: 120mm.
Total length: 213mm.
Closed thickness: 17mm.
Balance: -
Weight: 150g.
Opening: Carson Flipper system / ambidextrous opening pins on the blade
Washers: steel, with ball bearings made in Japan
Closure: Rockers Arm 8.11
Clip: stainless steel, removable and reversible
Sheath: -
Packaging: Plastic case with Wander Tactical logos
Notes: -

Exclusive limited edition series in collaboration with INSTRUCTOR ZERO (Team Zero International Training Security Company), renowned firearms training specialist, risk analyst and strategic consultant working worldwide for both military and law enforcement specialized units and government agencies.

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from private collection, previously purchased.
* Condition: New, never used
* Commercially available: Discontinued, limited run of only 33 numbered pieces
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: /
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory

Intended Use: Tactical / Collection

Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Treatment: Testudo MIL-C-13924
Handle: Anticorodal
Blade Length: 68mm.
Blade thickness: 4mm.
Length closed: 110mm.
Total length: 181mm.
Thickness when closed: 23mm. (15mm without clip)
Weight: 139g.
Closure: Liner Lock with additional safety catch
Clip: Stainless Steel
Packaging: watertight plastic box with Extrema Ratio and Team Zero logos, Warranty Certificate, Velcro Patch, Limited edition made in only 33 pieces

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Early 2000s knife, previously purchased.
* Condition: Overall in good condition.
* Commercially available Discontinued
* Sharpening: Factory.
* Marks on blade: Small abrasions given by being placed in Kydex sheath.
* Marks on handle: None
* Box: -
* Scabbard: Present
* Manuals, Certificates and Warranties: - -
* Checked and Certified by our in-house laboratory

Intended Use: Tactical

Production type: MidTech
Country of Production: USA
Blade: full tang stainless steel CPM-S30V
Finish: Tiger Stripe
Handle: Paracord
Blade length: 100mm.
Blade thickness: 4.5mm.
Total length: 195mm.
Weight: 125g.
Sheath: thermoformed kydex, with Tek-Lok multi-position attachment
Notes: previously purchased knife, from private collection

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased.
* Condition: Like New
* Commercially available 2018 Exemplar; currently offering other variants in other configurations.
* Sharpening: Factory.
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: -
* Manuals, Certificates and Warranties: -
* Checked and Certified by our in-house laboratory

Intended use: collectible/sporting/military

Production type: Midtech
Country of manufacture: South Africa
Blade: stainless steel CPM-S35VN
Blade treatment: blackwash
Handle: integral, machined titanium from solid, blackwash finish
Blade length: 103mm.
Blade thickness: 4.5mm.
Length closed: 132mm.
Total length: 234mm.
Thickness when closed: 16mm.
Weight: 191g.
Opening: Carson Flipper type, on ball bearings
Closure: FrameLock
Clip: titanium, machined from billet
Packaging: plastic case with ADV Tactical logos
Notes: entirely designed and built by Andre De Villiers in his own workshop

Who could have imagined that the Praetorian would conquer the knife world and become a design icon? That was the predetermined size of the design, but someone still wasn't okay with it... so here is the Praetorian Genesis, designed for the for the middle-of-the-road fanatics The Praetorian Genesis is a little smaller than the original, but retains more of a tough-guy look than ever before not scaring away the fearful, but still big enough for any task!

Intended Use: Sporty / EDC

Type of production: Mid-Tech
Country of manufacture: USA
Blade: CPM-S45VN steel
Blade finish: Dual Tone Tumbled & Satin
Handle: Purple Anodized Titanium with "Brushed Silver Flat" artwork and flamed hardware
Blade Length: 92mm.
Blade thickness: 5.5mm.
Length closed: 118mm.
Total length: 202mm.
Thickness when closed: 13mm.
Weight: 190g.
Closure system: Frame Lock
Clip: flamed titanium, removable
Packaging: cardboard box with Medford logos, plastic box with Medford logos, stickers and morale patch
Notes: "Loyalty" discounts are not active on this item.

The Medford Micro Praetorian T is the smallest of Medford's knife line, but no less capable. Although in Ancient Rome they were primarily charged with the defense of the Emperor, the Praetorian Guard was entrusted with a wide range of responsibilities, from fighting fires to protecting imperial interests. The Medford Micro Praetorian T, like its modern cousins and its ancient namesake, can be used for a myriad of tasks, from self-defense to everyday cutting tasks. With its titanium handle and wide, super-strong blade, the Micro Praetorian T is an EDC option that will last a lifetime without taking up too much pocket space.

Intended Use: Sporting / EDC

Production Type: Mid-Tech
Country of manufacture: USA
Blade: CPM-S45VN steel
Blade finish: Black PVD
Handle: Bronze Anodized Titanium with "Stained Glass" artwork and PVD hardware
Blade length: 75mm.
Blade thickness: 5.5mm.
Length closed: 98mm.
Total length: 172mm.
Thickness when closed: 13mm.
Weight: 134g.
Locking system: frame lock
Clip: titanium, removable
Packaging: cardboard box with Medford logos, plastic box with Medford logos, stickers and morale patch
Notes: "Loyalty" discounts are not active on this item.

Under the brand name Rockstead, from Ishida Co. in Sakai, Japan, the best industrial knives currently in production are currently marketed: created by Katsumi Kitano, who has been making quality knives for over 30 years to the extent that he has been awarded the highest distinction among artisan knife makers in Japan, they prove to be exceptional both in cutting ability, penetration and edge-holding and in innovation in the materials used and construction techniques.

Intended Use: Collection/Sportsman

Type of production: Midtech
Country of manufacture: Sakai - Japan
Blade: rolled stainless steel ZDP189 at 66.4 HRC on the inside and VG10 at 61.3 HRC on the outer cheeks
Blade treatment: mirror polish
Handle: Aluminum A6063S with anodization to Hv400 hardness and genuine Breed leather inserts
Blade length: 82mm.
Blade thickness: 3.7mm.
Length closed: 111mm.
Total length: 189mm.
Thickness when closed: 16.2mm.
Weight: 133g.
Opening: via ambidextrous pin
Washers: steel
Closure: Sub FrameLock of 2mm. made of SUS402J2 stainless steel at 50HRC
Clip: deep pocket, 1mm. 420J2 stainless steel with PVD treatment
Packaging: Wooden box with Rockstead logos, certificate with serial number and steel hardness test
Notes: Shinogi Zukuri type blade sharpening - Please note that the knife you receive will have a different serial number and production date than the model shown in the photographs.

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased - knife dating back to the late 80s
* Condition: excellent condition
* Commercially available: Discontinued since 2018
* Sharpening: Factory
* Marks on blade: No
* Signs on the handle: very small marks
* Box: packaging
* Sheath: in wood
* Manuals, Certificates and Warranties: -
* Checked and Certified by our internal laboratory

Intended use: Collection / Vintage

Type of production: handcrafted
Country of production: USA
Blade: hand forged Damascus steel
Blade treatment: -
Handle: in wood
Blade length: 110mm.
Blade thickness: 5.5mm.
Total length: 230mm.
Weight: 245g.
Scabbard: wooden scabbard
Notes: limited edition 1 of 200

Japanese steel blends with Italian excellence

For this 2020 collaboration, exclusive of Collini Cutlery, we have decided to propose a series of best sellers produced by Extrema Ratio. Knives made with the famous San Mai steel produced by Japanese Takefu Steel. Specifically, we used V-Toku2 carbonaceous at 62 / 63HRC for the central plate and SUS410 stainless steel for the two external plates, in order to guarantee a very high cutting capacity, penetration and sealing of the wire together with an easy regrinding. and maintenance but at the same time the blade has a remarkable resistance to corrosion and an important increase in resilience given by the type of external steel and by the laminated structure.
Selvan model: for this First Production Run a run of 5 pieces numbered from 1 to 5 was created.

The Selvans was born from the collaboration between Extrema Ratio and FISSS (Italian Federation of Sports and Experimental Survival). The project consists of modifying the Ontos, a military survival knife, to accentuate and maximize the performance of the knife as a hiking tool.

The handle has been lengthened and the blade weighted to favor the effectiveness of the cutting strokes and to make more use of the inertia of the stroke.

Intended use: Heavy Utility
Type of production: Industrial
Production Lama: Italy
Blade: integral, laminated Japanese steel (San Mai) with V-Toku2 (carbonaceous) cutting edge at 62 / 63HRC and SUS410 (stainless steel) external scales
Blade treatment: Testudo
Handle: Forprene
Blade length: 15.5mm.
Blade thickness: 6.3mm.
Total length: 310mm.
Thick when closed: -
Balancing: advanced
Weight: 424g.
Sheath: nylon, MOLLE compatible
Packaging: Cardboard box with Extrema Ratio logos
Notes: Numbered edition - cardboard box with Extremaratio logos and certificate - being the cutting edge in carbon steel it is advisable, in order to keep the blade in perfect condition, to protect the edge with a light surface of oil.

As in the ancient Japanese Samurai swords.

The rolled steel - imported into Italy by Collini Steel directly from the Japanese Takefu Steel - is based on the ancient Japanese tradition in the creation of the famous Samurai swords. In fact, as early as 1100 the expert Japanese blacksmiths combined different materials together to give the Katana swords incredible cutting capabilities combined with a resistance and flexibility previously unknown. It is thanks to this revolutionary construction technique that Samurai swords have been preserved to this day, becoming one of the most fascinating objects made by man. Following this tradition applied to modern metallurgy, today we are able to have technologically advanced steels already tested and used in cutlery also by famous brands such as Fallkniven, Cold Steel, Mcusta, Kai, Sog, Zwilling, Rockstead, etc.

Characteristics of San Mai steel: These are different types of metals bonded together to create a composite that encloses and intensifies the strengths of the metals individually taken:
- Longer tool life
thanks to the use of very high quality steels with high carbon content (VG10, CoS, Shiro) or sintered (SPG2), in the heart of the sheet (Core Steel), the blade, once hardened, achieves decidedly hardness and cutting performance higher than those achieved with the use of traditional steels.

- Greater resilience
built on the principle of Japanese swords, multilayer steel is difficult to break thanks to the toughness of the central steel (Core Steel) and the elasticity of the steel used for the side facing (Stainless Steel).

- Better corrosion resistance
the steel used for the external layers (Stainless Steel) guarantees the blade a high resistance to corrosion. The combination of the two or more materials used by Takefu Steel generates, on a galvanic level, a structure that improves corrosion resistance even on the wire.

- Easy processing even after heat treatment
although steel normally becomes harder after quenching, the lateral steel used in multilayer processing does not lose its softness and allows easy processing, drilling or welding even after heat treatment. For an optimal performance of the blade, cryogenic treatment is recommended.

- Improvement of the aesthetic result
The knives made with multi-state steel or with a damask pattern at the end of the processing are aesthetically elegant, refined and highly appreciated by collectors all over the world.

For more information: collinisteel

Japanese steel merges with Italian excellence

For this 2019/2020 collaboration, exclusive to Collini Cutlery, we have decided to offer a series of best sellers produced by Extrema Ratio. Knives made with the famous San Mai steel produced by the Japanese Takefu Steel. Specifically, for the central sheet we used the carbonaceous V-Toku2 at 62 / 63HRC and the stainless SUS410 for the two external sheets, in order to guarantee a very high cutting, penetration and sealing capacity of the wire together with an ease of regrinding and maintenance but at the same time the blade has a remarkable resistance to corrosion and an important increase in resilience given by the type of foreign steel and the laminated structure.

FULCRUM C model: for this First Production Run, a circulation of 10 pieces numbered from 1 to 10 was produced.

FULCRUM C is the compact version of FULCRUM, it maintains all the characteristics of solidity and robustness and, thanks to the reduced dimensions of the blade (only 110 mm) and the handle, it is easily portable and concealable. The rigid sheath can be positioned horizontally, vertically or in a 45 ° inclined position. The only safety of the sheath is automatic with extraction and re-insertion by pressure, this detail makes it an intuitive and extremely fast tool, particularly suitable for emergency use and for personal defense.

Use: backup knife
Blade: integral, in Japanese laminated steel (San Mai) with cutting edge in V-Toku2 (carbon) at 62 / 63HRC and external cheeks in SUS410 (stainless steel)
Blade thickness: 6.3 mm.
Blade length: 90 mm.
Total length: 210 mm.
Balancing: set back to 0.5cm. from the guard branch
Weight: 210g.
Sheath: ABS with Tek-Lok multiposition attachment
Notes: Numbered edition - cardboard box with Extremaratio logos and certificate

As in the ancient swords of the Japanese Samurai.

Rolled steel - imported into Italy from Collini Steel directly from the Japanese Takefu Steel - is based on the ancient Japanese tradition in the creation of the famous Samurai swords. Already in 1100 the expert Japanese blacksmiths in fact combined different materials to give the Katana swords incredible cutting capabilities combined with a resistance and flexibility previously unknown. It is thanks to this revolutionary construction technique that the swords from Samurai have been preserved to the present day becoming one of the most fascinating objects made by man. Following this tradition applied to modern metallurgy, we are now able to have technologically advanced steels already tested and used in cutlery also by famous brands such as Fallkniven, Cold Steel, Mcusta, Kai, Sog, Zwilling, Rockstead, etc.

Characteristics of San Mai steel: These are different types of metals bonded together to create a composite that encloses and intensifies the strengths of the metals taken individually:

- Longer tool life
thanks to the use of high quality steel with a high carbon content (V-Toku2, VG10, CoS, Shiro) or sintered (SPG2), in the heart of the sheet (Core Steel), the blade once hardened, reaches hardness and cutting performance significantly higher than that achieved with the use of traditional steels.

- Greater resilience
built with the principle of Japanese swords, multilayer steel is difficult to break thanks to the toughness of the central steel (Core Steel) and the elasticity of the steel used for the lateral coating (Stainless Steel).

- Better corrosion resistance
the steel used for the external layers (Stainless Steel) guarantees the blade a high resistance to corrosion. The combination of the two or more materials used by Takefu Steel generates, at the galvanic level, a structure that improves the corrosion resistance also on the wire.

- Easy processing even after heat treatment
although normally the steel becomes harder after hardening, the lateral steel used in multi-layer processing does not lose its softness and allows easy processing, drilling or welding even after heat treatment. For optimum performance of the blade, cryogenic treatment is recommended.

- Improvement of the aesthetic result
The knives made with multistate steel or with damask pattern at the end of the processing are aesthetically elegant, refined and highly appreciated by collectors all over the world.

Intended use: Heavy Duty / Hiking / Tactical / Collection

Type of production: artisan blade and handle - industrial folders
Country of production: Italy
Blade: 59 / 61HRC D2 steel with cryogenic quenching
Blade treatment: Raw
Handle: titanium folders with micarta handle
Blade length: 70mm.
Blade thickness: 5mm.
Length closed: 105mm.
Total length: 179mm.
Thickness when closed: -mm.
Balancing: -
Weight: 140g.
Opening: Carson Flipper system / ambidextrous opening pins on the blade
Washers: in steel, with ball bearings made in Japan
Closing: Rockers Arm 8.11
Clip: -
Sheath: -
Package: -
Note: -

Purpose of use: Collection / Sportsman

Type of production: Sprint Run, Industrial, Open Number
Country of production: Prato - Italy
Blade: Coreless Steel VG10 / VG2 61HRC made in Japan by Takefu Steel
Blade treatment: chemical detection
Handle: Anodized aluminum anticorodal
Blade Length: 70mm.
Blade thickness: 2.5mm.
Closed length: 99mm.
Total Length: 168mm.
Closure thickness: 11mm.
Weight: 84g.
Opening: ambidextrous opening pin
Washers: in fiberglass
Closure: Liner Lock
Clip: stainless steel, deep pocket, removable and reversible
Packing: Cardboard box with Extrema Ratio logos - Numbered guarantee certificate
Notes: Limited edition - Each specimen is numbered on the grip and on the internal warranty certificate - Exclusive Product of Coltelleria Collini

ABOUT THE STEEL

More than just a damask, Coreless steel made by Japanese Takefu Steel comes with over 70 layers of VG10 and VG2 stainless steel welded, forged and coated between them so that you can form a lightweight, slim and durable blade with a spectacular damask outer pattern.

The peculiarity of Coreless steel, unlike conventional rolled steel or Japanese San-Mai, is that it does not have a hard core steel that is used for the cutting edge but has both the VG10 and VG2 steels arranged to form the cutting edge so alternating and sequential to each other.

This particular construction gives the blade - compared to the two steels that make it, individually taken - greater resistance to oxidation, higher surface hardness (up to 61.5HRC), 25% more than cutting capacity, 25% more than the wire hold capacity and 25% more resilience making the blade more robust and less subject to breakage.

Thanks to this latest steel, Takefu Steel has been rewarded on Japanese territory for research and development and innovation in the cutting-edge landscape. Coreless steel has already been chosen by major brands such as Kai and Mcusta Zanmai who since 2017 proposed it on their top productions of professional kitchen knives.

Intended use: Tactical / Heavy Duty

Type of production: artisan seeds
Country of production: USA
Blade: in S35VN steel
Blade treatment: Satin finish
Handle: Flamed Blue Titanium
Blade length: 85mm.
Blade thickness: 5mm.
Length closed: 115mm.
Total length: 200mm.
Thick when closed: 12.5mm.
Balancing: on the guard branch
Weight: 190g.
Opening: ambidextrous thumbstood on the blade
Washers: in brass
Closure: Framelock
Clip: titanium, removable
Packaging: polymer tactical case with Medford logos
Notes: Skull Crasher on the shank - Designed and built by Greg Medford

Use: Collection / Sports
Blade: CPM-S30V stainless steel
Production Country: USA
Blade Finish: Black PVD + Laser engraving
Handle: FRN black and white
Blade length: 87mm.
Blade thickness: 3 mm.
Closed Length: 117mm.
Overall length: 205mm.
Weight: 110g.
Lock: Axis Lock
Clip: removable and reversible stainless steel
Packaging: cardboard box with Benchmade logos
Notes: Custom Edition with PVD blade engraved logo Pirates - Design by Mel Pardue

Folding knife made upon specific requests of the department of the Italian Army 185 ° RAO ( Target Acquisition Regiment ) and is now included the eponymous department . The knife supplied differs from the calendar for the total lack of writings or logos on the blade.

Limited Edition RAO model characterized by a satin blade in Japanese rolled steel produced by Takefu Steel. to the central plate and the 420J2 (56 HRC) In the specific CoS it is used to 61,5HRC (Cobalt Special deemed superior mechanically by 25% compared to the already appreciated VG10) for the two side plates, in order to have a very high capacity cutting but at the same time a remarkable resilience and resistance to oxidation.
folding knife made upon specific requests of the Italian Department of the Army 185th RAO (Regiment Acquisition Objectives) and currently supplied to the homonymous department. The knife supplied differs from that only civil to the total lack of written or logos on the blade.

Intended Use: Military / Tactical

Type of production: Industrial
Production Lama: Italy
Blade: (San Mai) Japanese-rolled stainless steel with sharp CoS to 61,5HRC in cryogenic tempering
Lama Treatment: Testudo
Handle material: anticorodal 4.5mm
Blade length: 118mm.
Blade Thickness: 6.3mm.
Length closed: 142
Overall length: 261mm.
Balancing: -
Weight: 335g.
Closure: front modified lock - threaded safety pin
Clip: -
Sheath: tactical nylon by Vega with M.O.L.L.E. attacks suitable for both the closed knife that open - color BLACK
Notes: sharpening the included Diamond

The Lynx is designed to satisfy all users in the 'scope of the Hunt, the Bushcraft and Survival. Thickness and dimensions have been studied to facilitate precision work and at the same time be reliable even for heavy work. Handy and compact, it is the perfect companion for the outdoors.

Type of production: Artisan
Lama production: Italy
Blade: in steel D2 at 59 / 60HRC
Lama treatment: Black Blood
Handle: Micarta
Blade length: 105mm.
Blade thickness: 6.5mm.
Total length: 230mm.
Balancing: set back
Weight: 288g.
Sheath: Kydex, thermoformed, with Tek-Lok type connection
Package: -
Notes: Each knife is unique and handcrafted; there may be slight differences in finishes, colors and materials compared to the photographed product.

Intended use: Tactical / Military / Collection

Type of production: Industrial
Country of production: Italy (by Lion Steel - Maniago)
Blade: stainless Niolox
Blade treatment: Blackwash
Handle: Anodized Titanium 6Al4V
Blade length: 113mm.
Blade thickness: 5mm.
Closed Length: 147mm.
Overall length: 240mm.
Thick when closed: 14mm.
Weight: 240g.
Lock: Frame Lock with stainless steel swing and integrated security system Rotoblock
Clip: Removable, burnished stainless steel
Packaging: Cardboard box with a nylon bag zip, patch velco Pohl Force and warranty certificates numbered
Notes: Edition limited and numbered edition for only 200 numbered copies of the blade, box and certificate

Craft knife produced by the famous Master cutler Italian Salice Max Sanna.

This model called Wave, uses the Japanese steel sintered SPG2 damask laminated to 69 layers.

Intended Use: Collection / Gentleman

Type of production: Artisan
Production Lama: Italy
Blade: Stainless sintered SPG2 in DAMACO rolled 61/62 HRC
Blade treatment: -
Handle: Canvas Micarta
Blade length: 73mm.
Blade thickness: 3mm.
Closed Length: 90mm.
Overall length: 170mm.
Thick when closed: 15mm.
Balancing: -
Weight: 92g.
Lock: Liner Lock
Clip: -
Sheath: Leather
Notes: ONE PIECE - knife custom crafted by Max

For more information you can view the site sull'accaio used: www.collinisteel.com

Medford Knife and Tools - Praetorian G D2 Green - knife

Intended use: Tactical / Collection

Production Type: Custom
Production Blade: Use
Blade: Stainless Vulcan D2
Treatment Blade: -
Handle: Titanium and G10 Green
Blade length: 95mm.
Blade thickness: 5mm.
Overall length: 227mm.
Thick when closed: 13mm.
Balancing: the branch guard
Weight: 232g.
Lock: Frame Lock
Clip: Titanium
Sheath: -
Packaging: case tactic polymers with logos Medford
Notes: Designed and built by Greg Medford

Intended Use: Tactical/Collection

Production type: Custom
Country of Production: Usa
Blade: Stainless steel CPM S35 VN 
Blade finish: Tumbled
Handle: Blue anodized titanium, flamed
Blade Length: 95mm.
Blade thickness: 5mm.
Total length: 227mm.
Thickness when closed: 13mm.
Weight: 245g.
Locking mechanism: Frame Lock
Clip: Titanium, flamed
Package: Tactical polymer case, with Medford logos
Notes: Designed and built by Greg Medford