Year 2021

The Herring dagger is one of the most loved military knives by enthusiasts.

Its original name is Fairbairn Sykes or Commando Dagger and it was present in the endowment of the British Commandos.

A dagger that entered Italian history in World War II, thanks to the exploits of young soldiers of the 1st "Folgore" Reconnaissance Squadron, who were equipped with this weapon during Operation Herring. He has behind him a heroic piece of history that is rarely talked about, despite the fact that these young boys, thanks to their devotion to the cause and their courage, have written an important page in Italian history.

Extrema Ratio wanted to pay homage to this dagger trying to remain faithful to the original forms, while using the most modern production techniques.

The very special hand-made finish of the handle simulates the aging of brass and gives the dagger a dated look, similar to the original.

The dagger was developed in collaboration with the 185th RAO and adopted as a ceremonial commemorative dagger for the 20th anniversary of the regiment's establishment and the 75th anniversary of the Herring mission.

The knife is equipped with a polymer case with historical frieze of the F Squadron, leather / kydex sheath with brass tip and two commemorative scrolls.

PLEASE NOTE:
NE version, simulacrum replica with rounded tip and blunt blade, to allow free sale and possession according to the current regulations in force on the Italian territory.

We warn that any subsequent modifications and sharpening made to the blade modify the status of simulacrum of the Herring NE. In this case it will be subject to the regulations in force in the respective countries. Furthermore, these changes will void the Extrema Ratio warranty.

Intended use: Collection / Tactical

Type of production: Industrial
Country of production: Italy
Blade: not sharp, in stainless steel N690Co 58HRC
Blade treatment: Burnishing MIL-C-13924
Handle: Aged brass
Blade length: 167mm.
Blade thickness: 6.3mm.
Total length: 289mm.
Weight: 276g.
Sheath: leather, ABS and brass sheath
Packaging: Polymer case with historical frieze of Squadron F and 2 commemorative scrolls
Note: -

Intended Use: utility / bushcraft

Type of Production: Artisan
Country of Production: Italy
Blade: D2 steel at 59/60HRC
Blade Finish: Raw Finish
Handle: Micarta
Blade Length: 105mm.
Blade thickness: 5mm.
Total length: 235mm.
Balance: backward
Weight: 260g.
Sheath: kydex
Package: -
Notes: Each knife is unique and handcrafted

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.

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

Knife withdrawn from a private collection - Rare model produced by the Master of Defense around 2005 - Excellent condition. Never resharpened - Without original box - Checked and certified by our internal laboratory Coltelleria Collini.

Master of Defense, an eclectic American brand no longer in business and later taken over by Blackhawk! Blades, produced various tactical and military type folding and fixed knives, all made in collaboration with well-known Knifemakers such as Elishewitz, Janich, Keating, Ayoob, Watson and Casillas.

The only copy at our disposal, without box, rare and out of production for many years.

Intended use: Tactical / Collection
Type of production: Industrial
Production Lama: USA
Blade: 154CM stainless steel - DLC
Handle: polymer with aeronautical aluminum inserts with Kraton anti-slip
Blade length: 90mm.
Blade thickness: 3.5mm.
Closed length: 130mm
Total length: 223mm.
Thick when closed: 20mm
Weight: 170g.
Closure: Button Lock
Clip: removable, in stainless steel
Packaging:

Intended Use: Sporting/EDC

Production type: Industrial
Country of Production: Taiwan
Blade: Stainless steel CPM-S35VN 59/60HRC
Blade Treatment: Satin finish
Handle: Aluminum T6061 mirror polished with G10 inserts
Blade length: 89mm.
Blade thickness: 3.8mm.
Length closed: 120mm.
Total length: 209mm.
Weight: 125g.
Closure: Liner Lock with additional safety catch on the right handle
Clip: Stainless steel, removable
Package: Cardboard box with Cold Steel logos
Notes: Numbered and limited edition of only 3500 pieces with signature of "Lynn C. Thompson" laser engraved on the blade and pencilled on the product packaging.

FROM COLD STEEL WEBSITE

The Oyabun Limited is a high-end collector's version of our Oyabun. It shares features in common with the standard model in terms of functionality and appearance, but differs greatly in the materials used in its construction. It also has the value of being a collectible keepsake as only 3500 were produced. Each one is serially numbered and each box will be personally signed by Lynn C. Thompson himself! The blade's fine S35VN steel is an expensive powder coated steel that is heat treated to Rc 59-60 and hardened to sub zero. It has been given an attractive two-tone finish on the blade planes and a high satin polish on the blade bevels. Notably, the handle frame is milled from two solid billets of 6061 aluminum to create the bolster and pommel, which has been given a beautiful mirror polished finish. The handle also features CNC-machined G-10 plates with a diamond checkerboard pattern for a good, secure grip.

"I like flashy knives and when they are limited collector's editions with serial numbers made from high quality materials, I like them even more. That's why I think you'll like our Oyabun Limited. Only 3500 pieces will be made. All individually serial numbered with 6061 aluminum frames, CNC machined handles that are completely checkered just like my much original and a two-tone polished S35VN blade! And best of all, all this splendor and high performance is backed by our state-of-the-art leaf spring lock and secondary safety, so you know it won't bend on your hand. Now you have a knife that is worth every penny asked (just compare) and has tremendous appeal/appreciation from collectors!!!" - Lynn Thompson

Intended use: collection / sporting

Production type: Industrial
Country of Production: Taiwan
Blade: Carbon steel CPM-3V
Blade treatment: satin finish
Handle: Kray-Ex (Kraton) with stainless steel guard and pommel
Blade length: 152mm.
Blade thickness: 4.8mm.
Total length: 292mm.
Balance: on the guard branch
Weight: 269g.
Sheath: Secure-Ex ABS with nylon belt loop.
Packaging: cardboard box with Cold Steel logos
Notes: new version 2021 of the popular Master Tanto 6" produced by Cold Steel since the early 80's

Intended Use: Sporting / Collection

Country of Production: Taiwan
Blade: AUS 8A stainless steel with Gray Powder Coat treatment
Handle: GFN-PA66
Blade Length: 89mm.
Blade thickness: 2.8mm.
Length closed: 114mm.
Total length: 204mm.
Weight: 95g.
Closure: Back Lock
Opening: One-handed, through pivot on the blade
Clip: steel, removable, ambidextrous
Package: cardboard box with Ka-Bar logos

Intended Use: Sporting / Tactical

Production type: Industrial
Country of Production: Taiwan
Blade: Stainless steel CPM-S35VN
Blade treatment: DLC coating
Handle: G10
Blade length: 102mm.
Blade thickness: 3.5mm.
Length closed: 136mm.
Total lenght: 238mm.
Thickness when closed: 13mm.
Weight: 147g.
Closure: Tri-Ad Lock
Clip: removable and reversible, in stainless steel
Package: cardboard box with Cold Steel logos
Notes: -

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