Extrema Ratio

Extrema Ratio

Extream Ratio Knives made in Italy, Price matching available, contact us for details. We strive to provide the best prices.

Extrema Ratio, located in Prato, Italy, has been designing, manufacturing and selling high performance combat knives since 1997 enjoying a reputation for excellence that is unsurpassed in the military and tactical knife industry.

The increased capacity through the years enabled Extrema Ratio to extend its operations. As part of this effort, the company moved in 2004 to a new 600 square meter facility in order to meet the market demand and the company quickly established itself as one of the country's leading cutlery manufacturers.

Extrema Ratio serves military and law enforcement communities as well as commercial markets and the knives are well known and sought after all over the globe.

The company prides itself in design, material and quality to deliver a high end product that meets the most severe mil-standards.

The production based on modern cutting edge technology is combined with traditional craftsmanship and the result is the pinnacle of this synthesis. The Extrema Ratio design team uses the 3D system to design new models and create prototypes. Each knife design is then meticulously inspected and then field tested. At this point the finest materials are chosen for durability, function and beauty. Each knife is then hand assembled and hand finished and inspected by Extrema Ratio team of craftsmen.

First class handwork and well-selected material have contributed to form the image of the Extrema Ratio trademark all over the world.

Each knife that is manufactured at Extrema Ratio has measured up to the Company rigorous standards for quality and performance. The knives are the result of painstaking research and development. This is an Extrema Ratio hallmark. Extrema Ratio knives represent a real, solid value for the money.

All of the knives are made from N690 Cobalt Stainless Steel which is a steel from a small plant in Austria, often used in the manufacture of surgical instruments. This steel along with their tempering methods produce a steel of great strength, flexibility with the capability to take and retain a razor sharp edge. The handles provided on the fixed blade knives are made from a grip polymer called Forprene which provides a very sure and comfortable grip even when wet. The folding range of knives have a shell made from a super strong anticorodal alloy and the best materials are used throughout to ensure reliability and longevity.

Extrema Ratio military knives are consistently developed with the direct involvement of the end user.

Extrema Ratio creates a great range of tough knives suitable for use in the toughest of environments, making them a great choice for a survival knife or back up tool. The range goes from small folders to large Kukri with lots of choice in between offering most of what you would need in the knife area.

Extrema Ratio knives are developed in close cooperation with the Italian and foreign Armed Forces. To achieve best performance and function, no compromises are made in the design. This makes Extrema Ratio Knives best known for their outstanding ruggedness and they are sturdy enough to meet the requirements of the toughest military standards.

To reach all of the above, a long term co-operation project between the Facoltà di Scienze Motorie (PG) and Extrema Ration Company has been set up.

Through the challenges associated with resolving technical issues, finding an efficient and ergonomic design and optimal operating parameter, the Facoltà di Scienze Motorie (PG) partnership has provided innovative opportunities through the whole manufacturing process.


Extrema Ratio is UNI EN ISO 9001:2008 certified and is an official supplier of the Armed Forces with NATO code (N/CAGE) AD856

Our knives are built with the most current high tech manufacturing processes. Each Extrema Ratio knife is a blend of the finest materials available and a commitment to craftsmanship. When it comes to knives for survival use, one of the most important requirements is that the knife should be strong. Built to last.

Unfortunately, the manufacturing excellence and quality of our knives leads people to believe they are virtually indestructible. Sadly, this is not the case.

When the correct bending moment (torque) is reached also the toughest knife breaks.

Factors which determine the strength of a knife are its blade length, bladethickness and geometry, steel quality and technical design. Depending on what you want from a knife you should consider these qualities before you make your purchase, only then will you be able to make the optimal choice.

A long blade gives you more power, a thick, sturdy blade is stiffer,a well-treated high-end steel stands strain better and a well-designedknife is free from natural breaking zones. We leave no stone unturned in the search for Excellency.

In each knife we produce we do look for total performance solutions along with that style that defines all of our products entirely made in Italy.

What sets our knives in their own category of excellence is that every blade is free-hand ground, every knife is individually fitted, and every knife sharpened by hand. Precision and attention to small details, the use of special steel alloys, new techniques and knowledge and space technology materials make the difference.

With the objective of designing unique knives catered for the Armed Forces and Law Enforcement community and enthusiasts as well, Extrema Ratio has grown into a globally renowned brand recognized for dedication towards creating the next great combat knife. Our knives always put consumers and end users first.

All our products are built with high quality material and engineered in the best conditions and can be disassembled for easy cleaning and maintenance. This allows the worn parts to be easily replaced as well.As a private company, Extrema Ratio continues to expand into new horizons and push the limit further with each product unveiling.

If you plan to change your Extrema Ratio knife it will not be because you are disappointed because our product has not performed as promised but because you have probably changed your hobby.Here at Extrema Ratio anything is possible, the impossible just takes longer.





Nagornysknives.com is a proud supporter of our Police Department’s and Military. Without the sacrifice of our men and women who serve our great country we would not have the freedoms we have today.  If you are military or in the police, please contact as we have very low prices and we want to give you a special price.   Please note some items cannont be discounted due to already low prices.


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Extrema Ratio BF2 Classic Knife

$199.99 *
Old price $268.95

NK1 Neck Knife Desert Warfare

$139.99 *
Old price $192.00
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"Extrema Ratio" Small Folder Knife

$309.99 *
Old price $418.00
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"Extrema Ratio" MF1 Folder

$299.99 *
Old price $439.99
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"Extrema Ratio"MF1 Folder

$319.99 *
Old price $452.99
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"Extrema Ratio" Desert Warfare Drop Point Knife

$319.99 *
Old price $468.00
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Extrema Ratio BF2V Linerlock Marlin Spike Knife

$159.97 *
Old price $272.00
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Extrema Ratio NK1 Neck Knife Stonewashed

$96.99 *
Old price $165.95
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Extrema Ratio NK1 Neck Knife Desert Warfare

$119.99 *
Old price $192.95
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Extrema Ratio NK1 Neck Knife Black EX123NK1BL

$109.99 *
Old price $181.95
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"Extrema Ratio" Dark Talon Knife

$161.99 *
Old price $276.95
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Extrema Ratio BF1 Classic Tanto Folding Knife

$137.99 *
Old price $222.99
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"Extrema Ratio Knives"BF1 Classic Knife

$137.99 *
Old price $222.99
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Extrema Ratio BF M1A2 Satin Folder Knife

$139.99 *
Old price $199.95
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Extrema Ratio Desert Warfare Knife EX135BF1WCD

$159.97 *
Old price $265.00
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Extrema Ratio

$203.99 *
Old price $296.95

Extrema Ratio Resolza Linerlock Knife

$168.99 *
Old price $271.95
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Extrema Ratio NK3 K Desert Warfare Neck Knife

$189.99 *
Old price $237.96
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"Extrema Ratio" BF2 Classic Knife EX135BF2CD

$179.99 *
Old price $268.95
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Extrema Ratio Nightmare Folding Karambit Black Knife

$293.00 *
Old price $356.97
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* Prices plus sales tax, plus delivery