Sport, Military and Collectible Knives | Coltelleria Collini

DICOK TS evolves the DICOK design with technical updates aimed at professional underwater use. Developed with industry experts, it is designed to ensure reliability and safety in the marine environment.

The blade incorporates a line cutter for quick action even in critical conditions. Nitrogen steel replaces the previous N690Co, offering greater resistance to oxidation and corrosion in saline environments. The new EXP Dark coating further improves protection against corrosive agents while maintaining anti-reflective properties.

The steel structure was chosen to ensure superior hardness, edge retention, and structural strength compared to titanium, essential characteristics for operational use.

Supplied with a Kydex sheath and paracord for belt attachment, MOLLE and webbing systems, and a fiberglass-reinforced nylon handle with a non-slip finish that is ergonomic and safe even when wearing diving gloves.

Intended use: Diving knife

Type of production: Industrial
Country of production: Italy
Blade: Nitrogen steel
Blade finish: EXP Dark coating 
Handle: glass fiber reinforced nylon
Blade length: 81mm. 
Blade thickness: 4mm.
Total length: 196 mm.
Weight: 150 g.
Sheath: Kydex neck sheath, compatible with various attachment systems.
Packaging: Cardboard box with Extrema Ratio logos.
Notes: To maintain performance over time, we recommend rinsing, drying, and lubricating the knife periodically after use in the sea.

Technique and tradition in harmony - For those seeking a balance between modern performance and ancient spirit.
The VENATUS F Nitrogen Black Satin with walnut wood handle combines a versatile blade geometry with materials of strong aesthetic and symbolic value. The 12 cm satin-finished Nitrogen steel offers resistance to oxidation, ease of sharpening, and precise cuts.

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: 119 mm.
Blade thickness: 3.8 mm.
Total length: 248 mm.
Weight: 185 g.
Sheath: leather, ambidextrous, modular, made in Italy
Packaging: Cardboard box with Extrema Ratio logos
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KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased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

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: -

KNIFE WITHDRAWN FROM PRIVATE COLLECTION

* Type: Previously Purchased
* Condition: in like-new condition with perfect original box
* Commercially available Discontinued since 2013
* Sharpening: Original edge
* Marks on blade: no
* Marks on handle: no
* Box: yes
* Scabbard: no
* Manuals, Certificates and Guarantees: no
* Checked and certified by our in-house laboratory

Intended use: Sporting / Utility

Production type: Industrial
Country of manufacture: Japan
Blade: SANMAI stainless steel
Blade finish: Satin finish
Handle: Micarta and Titanium
Blade length: 115mm
Blade thickness: 4mm.
Total length: 235mm.
Weight: 152g.
Closure: Liner Lock
Clip: Stainless steel
Packaging: aluminium box with Cold Steel logos
Notes: -

For almost a decade, Cold Steel® offered a wicked-looking little boot knife called the Culloden®. It was based on the traditional Scottish 'black knife' or 'Skean Dhu' as it is more commonly called in Gaelic, the ancient language of Scotland.

The Caledonian Edge™ features a number of modern variations and refinements over its predecessor. The blade is made of a virtually unbreakable San Mai III® construction and, like the original Skean Dhu, features a thin, sharp point, as sharp as the proverbial needle. 

The traditional tang seen on the Skean Dhu of yesteryear has been retained and provides an aggressive, non-slip platform for the thumb and forefinger, allowing for better control when using the blade to cut or pierce.

The handle of the Caledonian Edge™ has a profile that hugs the palm of the hand and a relatively thin cross-section that enhances its qualities. It is flat enough not to roll or twist in the palm of the hand, yet comfortable enough to accommodate a wide range of grip styles. A perfect blend of strength and beauty, it features a mirror-polished black Micarta superstructure and titanium bolsters.ne handed opening.