Coltelleria Collini projects

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 LoTactical

HISTORY
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.

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.

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