Sport, Military and Collectible Knives | Coltelleria Collini
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ExtremaRatio - Aero - Black Nitrogen & Forest Green Orange Aluminium - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-GREEN€192.62Only 1 leftOnly 1 left
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ExtremaRatio - Aero - Black Nitrogen & Blue Orange Aluminium - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-BLUE€192.62Only 1 leftOnly 1 left -
ExtremaRatio - Aero - Black Nitrogen & Mud Orange Aluminum - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-MUD€192.62Only 2 leftOnly 2 left -
ExtremaRatio - Aero - Black Nitrogen & Black Lime Aluminum - folding knife
With thirty years of experience in designing professional knives, Extrema Ratio has developed a model designed for those seeking an everyday carry tool that combines functionality, lightness, and attention to detail.
The minimalist profile, clean lines, and light weight are not merely aesthetic choices for their own sake, but the result of a design focused on efficiency. Every element serves a specific purpose. Nothing has been added merely to impress; nothing is there without a reason.
AERO is built using materials selected to ensure reliability in daily use and minimal maintenance: an Anticorodal aluminum handle and a Nitrogen steel blade, prized for its corrosion resistance, edge retention, and ease of resharpening.
Intended Use: Sports / EDC
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen steel
Blade Finish: MIL-C-13924 burnishing
Handle: Stainless steel scales with anodized anticorodal aluminum grip
Blade Length: 69mm.
Blade thickness: 2.3 mm.
Overall length: 173 mm.
Weight: 92 g.
Lock type: Liner Lock
Clip: -
Packaging: Cardboard box with Extrema Ratio logos
Notes: -ER-AE-BLIM€184.43Only 1 leftOnly 1 left -
ExtremaRatio - Satre F - Stonewashed Nitrogen & Outdoor Green Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: Stonewashed
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NSWODG€154.10Only 1 leftOnly 1 left -
ExtremaRatio - Satre F - Black Nitrogen & Periwinkle Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NBKP€177.87Only 1 leftOnly 1 left -
ExtremaRatio - Satre F - Black Nitrogen & Yellow Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NBKY€177.87Only 1 leftOnly 1 left -
ExtremaRatio - Satre F - Black Nitrogen & Orange Anticorodal - Knife
SATRE F è un chiudibile compatto pensato per uso quotidiano. Mantiene l’impostazione robusta della linea SATRE in un formato tascabile, con ingombri ridotti e portabilità reale. Sta in tasca senza dare fastidio, ma quando serve è pronto.
Apertura flipper rapida e controllabile con una mano. Struttura con doppia cartella in acciaio e blocco Liner-Lock: rigido, affidabile, senza giochi. La clip deep carry lo rende discreto in tasca. La fresatura sulla guancetta non è solo estetica: permette di identificare subito la variante anche da chiuso.
Le versioni in Böhler N690Co (Black, Stone Washed) puntano su resistenza all’usura e buona tenuta del filo, con manutenzione semplice. Le varianti in acciaio Nitrogen (Periwinkle, Orange, Yellow) privilegiano la resistenza alla corrosione, ideali per ambienti umidi o uso intensivo all’aperto. La versione Outdoor Nitrogen è la più orientata all’impiego sul campo.Intended use: Sport / EDC
Production type: Industrial
Country of origin: Italy
Blade: Nitrogen steel
Blade finish: MIL-C-13924 burnishing
Handle: Stainless steel liners with anodized Anticorodal handle scales
Blade length: 72 mm
Blade thickness: 3 mm
Overall length: 174 mm
Weight: 98 g
Locking mechanism: Liner Lock
Pocket clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: Flipper opening systemER-SATF-NBKOR€177.87Only 1 leftOnly 1 left -
ExtremaRatio - MF1 EVO D Outdoor - Satin Nitrogen & OD Green G10 - folding knife
A folding knife from the MF1 EVO platform, designed specifically for outdoor use. Engineered for use in natural environments and field activities.
Green G10 handle with a non-slip texture for a secure grip even in wet or dirty conditions. Full-flat Drop Point blade in Nitrogen steel with a satin finish: good corrosion resistance, edge retention suitable for intensive use, and the ability to be resharpened in the field.
Liner-Lock closure system with additional Hidden Lock safety. Internal structure reinforced with a double steel frame for greater rigidity. Reversible Deep Carry clip for deep carry.
Intended Use: Outdoor / Sports
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen Steel (58 HRC)
Blade Finish: Satin
Handle: Double stainless steel frame and textured G-10 scales
Blade Length: 95mm
Blade Thickness: 4mm
Closed length: 107 mm
Overall length: 230 mm
Weight: 170 g
Closure system: Liner Lock + Hidden Lock side safety system
Clip: “deep carry” type, stainless steel, removable and reversible
Packaging: Extrema Ratio box with official logos
Notes: -ER-MF1EVOD_OD€213.11Only 1 leftOnly 1 left -
ExtremaRatio - MF1 EVO D Knife - Satin Nitrogen & Black G10 - folding knife
A folding knife designed for everyday use and general-purpose operations. A version of the MF1 EVO platform featuring materials optimized for durability and easy maintenance.
Black G10 handle with a non-slip texture, designed to ensure a secure grip even in challenging conditions. Drop Point blade in Nitrogen steel with a satin finish: good corrosion resistance, decent edge retention, and easy to resharpen.
Liner-Lock closure system with additional Hidden Lock safety. Reinforced structure with a double steel frame for greater rigidity. Reversible Deep Carry clip for deep and discreet carry.
Intended Use: Outdoor / Sports
Production Type: Industrial
Country of Manufacture: Italy
Blade: Nitrogen Steel (58 HRC)
Blade Finish: Satin
Handle: Double stainless steel frame and textured G-10 scales
Blade Length: 95mm
Blade Thickness: 4mm
Closed length: 107 mm
Overall length: 230 mm
Weight: 170 g
Closure system: Liner Lock + Hidden Lock side safety system
Clip: “deep carry” type, stainless steel, removable and reversible
Packaging: Extrema Ratio box with official logos
Notes: -ER-MF1EVOD-BK€211.48Only 2 leftOnly 2 left -
ExtremaRatio - BFK EVO - The Carry Box - 500pcs Limited Edition - folding 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.ER-CARRYB€218.00Only 0 leftOnly 0 leftOut of stock
Sports, Outdoor, Tactical, and Collectible Knives: The Collini Selection
For over 50 years, Coltelleria Collini has been a reference point in Italy for the world of specialized cutlery. Since 1968, we have been selecting sports, outdoor, professional, and collectible knives, collaborating exclusively with official brands, historical manufacturers, and master artisans.
In this category, you will find thousands of original knives, chosen for demanding collectors, EDC, outdoor, and bushcraft enthusiasts, as well as professional operators who require reliability, quality materials, and consistent performance over time.
Military & Tactical Knives
Knives designed for heavy-duty and professional use, where robustness and reliability are paramount. We select world-leading brands such as Extrema Ratio, Zero Tolerance, Ka-Bar, and Cold Steel. Fixed and folding blades developed to withstand extreme conditions.
Sports & Outdoor Knives
From trekking to hiking, from bushcraft to everyday carry (EDC). Discover the Italian excellence of Fox Knives and LionSteel, the Nordic solidity of Fallkniven, and great classics like Opinel and Spyderco.
Collectible & Rare Knives
Custom, vintage, limited edition, and discontinued knives. Through our Approved program, we acquire, evaluate, and certify private collections, offering our customers access to rare, display, and investment-grade blades.
Why choose Coltelleria Collini since 1968
We are not just an e-commerce site, but a historic cutlery shop with direct experience on the products we offer. Buying from us guarantees:
- Certified Originality: we are official dealers for all brands we carry.
- Real Stock with fast shipping.
- Qualified Assistance and technical advice before and after sales.
Knives FAQ
There is no absolute "best" brand, but specific leaders for each use. For tactical and professional use, Extrema Ratio and Zero Tolerance are top tier. For outdoor and EDC, Fox, LionSteel, Fallkniven, and Spyderco excel.
Yes, buying sports and collectible knives online is generally legal for adults. However, laws regarding carrying and transporting knives in public vary significantly by country. Always check your local regulations.