Extrema Ratio

Extrema Ratio

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

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A.S.F.K.
Extrema Ratio
A.S.F.K.
A.S.F.K. is a dagger dedicated to and adopted by the new Comando Forze Speciali Esercito Italiano (Italian Special Fo...
€359.00 *
TK Tool 2.0
Extrema Ratio
TK Tool 2.0
A multifunctional tool with a basic and essential design, jointly developed with military professionals. It features ...
From €49.00 *
FULCRUM C FH
Extrema Ratio
FULCRUM C FH
FULCRUM C is the compact version of the FULCRUM, which it equals in robustness and sturdiness. Its downsized blade (o...
From €231.00 *
Task C
Extrema Ratio
Task C
The compact version of our TASK multipurpose knife. Besides a reduced size of both blade and hilt, TASK C differs fro...
From €194.00 *
T 4000 C
Extrema Ratio
T 4000 C
Ein unverkennbares Extrema Ratio Messer mit Tanto Klinge, ist das Back Up Messer T4000 C. Für diejenigen, die die jap...
€232.00 *
Corvo
Extrema Ratio
Corvo
This is a traditional Chilean Army combact knife. Its origins are misterious: it did probably arrive in the New World...
€292.00 *
Kreios
Extrema Ratio
Kreios
We designed and developed KREIOS with Master Instructor Daniele Dal Canto of F.I.S.S.S. (the Italian Survival Federat...
€427.00 *
Mato Grosso
Extrema Ratio
Mato Grosso
Thistool’sname,literallymeaning“thickbush”inPortuguese, is reminiscent of a well-known South-American wooded region. ...
€338.00 *
Waki Black
Extrema Ratio
Waki Black
WAKI comes from the well known Japanese Wakizashi swords. Samurai was always bringing it with him, while the katana w...
€394.00 *
Dobermann IV
Extrema Ratio
Dobermann IV
Versions: Tactical Classic DOBERMANN IV evolved from the rst and most classic Extrema Ratio knife, the K1 DOBERMANN. ...
€344.00 *
Fulcrum
Extrema Ratio
Fulcrum
This milestone among multipurpose knives, employed on a large scale in Afghanistan as standard issue equipment of the...
From €334.00 *
N.K. 1
Extrema Ratio
N.K. 1
This reduced-size design was based on the Skinner (which comes with our Culter Venatorius hunting knife) and perfecte...
From €119.00 *
N.K. 2
Extrema Ratio
N.K. 2
This reduced-size design was based on the model N.K.1 and it differs from it for the tanto shaped blade and the blood...
From €127.00 *
N.K. 3
Extrema Ratio
N.K. 3
This reduced-size design was based on the model N.K.2 and it differs for the longer blade. The design of the handle p...
From €150.00 *
N.K. 3 K
Extrema Ratio
N.K. 3 K
This knife extends our neck knife series. It comes with N690 steel tanto blade, blood-graining slot on the blade and ...
From €165.00 *
Ontos
Extrema Ratio
Ontos
Growing demand from the professionals amongst our clients persuaded Extrema Ratio to design a survival tool for all s...
€504.00 *
Selvans
Extrema Ratio
Selvans
The SELVANS was developed as a cooperation between Extrema Ratio and F.I.S.S.S. (the Italian survival federation). It...
From €544.00 *
BF2 R
Extrema Ratio
BF2 R
“Full size” folding knives especially suitable for professional use by military or police operatives on the field. Th...
From €185.00 *
BF2 V
Extrema Ratio
BF2 V
Das Extrema Ratio BF2V hat eine ziemlich kurze Klinge mit Tanto-Spitze. Da der Griff ein wenig länger ist, bietet das...
€200.00 *
MF0
Extrema Ratio
MF0
MF stands for Medium Folder: a product line positioning itself between the BF (Basic Folder) and the Heavy Folder lin...
From €281.00 *
MF1 BC
Extrema Ratio
MF1 BC
Everything just said of the MF line is true of model MF1. Its variant, MF1 BC (“Belt Cutter”) features a built-in bel...
From €304.00 *
MF 2
Extrema Ratio
MF 2
The Medium Folder MF series from Extrema Ratio are mid-sized offerings with all the strength of a fixed blade. They r...
From €342.00 *
MF3 Ingredior
Extrema Ratio
MF3 Ingredior
The Medium Folder MF series from Extrema Ratio are mid-sized offerings with all the strength of a fixed blade. They r...
€364.00 *
Nightmare
Extrema Ratio
Nightmare
Karambit folding knife with rescue characteristics. It has been adopted by the special units of U.S.I.V.P. Principali...
From €250.00 *
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