Extrema Ratio specialises in the development and production of professional knives for the military, public safety and rescue services. We produce high quality military, tactical and hunting knives, as well as a wide range of robust knives suitable for the toughest conditions, making them an excellent choice for a survival knife or back-up tool. The range ranges from small folding knives to large Kukri, offering exactly what you would expect from a high-end professional tool.
Fulcrum Black extremely durable, versatile knife. The main rack withstands the bending load with a force of 150 kg. The tanto profile maintains sharpness of the cutting edge and penetration regardless of the intensity of wear.
Task C Black, a compact version of the full-size versatile Task knife - so-called „back-up”. Simple construction, full tang blade, thumb ramp, finger choil undercut, high flat cut. This is tool for a professional.
Fulcrum S Black, extremely durable, versatile. A lighter, shorter version of the Fulcrum knife with a 150mm blade that withstands the bending load with a force of 150kg. The tanto profile maintains sharpness of the cutting edge...
RAO II Black new version of RAO knife for the "185° Rgt. Ricognizione e Acquisizione Obiettivi." It features a new blade and a rounded handle for users who prefer a reverse grip. Bolt Lock and screw-in pin effectively turn folder into a fixed-blade knife.
RAO Black Paratrooper Reconnaissance Regiment "185° Rgt. Ricognizione e Acquisizione Obiettivi," entrusted ER with designing knife tailored to unit’s specific operational needs. Bolt Lock combined with screw-in pin transforms folder into fixed-blade knife
TK Tool 2.0 Black, a multifunctional tool developed together with military professionals. Multi tool equipped with basic functions necessary on the battlefield. The small size allows easy carrying and used during everyday tasks.
TK Tool 2.0 Stone Washed, a multifunctional tool developed with military professionals. Multi tool equipped with basic functions necessary on the battlefield. The small size allows easy carrying and used during everyday tasks...
N.K.1 Desert Warfare, neck knife with impressive cutting efficiency. Arcuate undercutting of the back of the blade under the thumb or index finger according to the style of the fight. Sheath for hanging on the neck, optional for a vest or belt...
TK BF2, the Extrema Ratio professional training knife faithfully reproduces the BF2 folder. For training combat techniques, defense against knife attacks.
Fulcrum C (Comapct) Black, a compact version (back-up) of the full-size Fulcrum knife. Simple to build, massive, easy to hide, a knife with a fixed blade full-tang construction. Well-balanced with above-average strength, professional tool.
SHRAPNEL OG Black compact (back-up) knife. In expert hands this knife is incredibly fast. Well-balanced with above-average strength, a typical tool for professionals.
Col Moschin C (Compact) Black, a compact (back-up) knife version of the Col Moshin, which is equipped with the Italian 9th "Moschin" Parachute Regiment. Well-balanced with above-average strength, a typical tool for a professional.
Pugio SE (Single Edge) Black, (back-up) has a similar form of a successful dagger called Pugio. One-sided blade, especially for users who value inverted grip. The blade was designed to allow...
T4000 C Black is a continuation of the tanto knives from Extreme Ratio. A proposal for those who love the Japanese profile of the blade and do not want to give up the tactical handle and sheath. Incredibly fast perfectly balanced. Knife for a professional
BF3 Dark Talon Black is a slim, lightweight, easy-to-carry Extrema Ratio series of Basic Folder. A great tool as well as an extremely effective knife for self-defense. Perfectly balanced with a sharp piercing blade.
Glauca B1 Black result of collaboration between ER and GIGN special operations unit of French National Gendarmerie. Medium-weight knife with blade designed for aggressive use. Easy-to-sharpen tanto profile retains edge sharpness and penetration capability
Shrapnel OG DW, compact knife (back-up) with a fixed blade covered with desert camouflage Desert Warfare. In expert hands this knife is incredibly fast. Well-balanced with above-average strength, a typical tool for a professional...
N.K.3 BLACK based on the N.K.2 neck knife is distinguished by its longer head. Sheath adapted to hanging on the neck, optional on a vest or belt, which allows the use of a knife as a clinch pick...
Dobermann IV Tactical Black the most versatile knife Extrema Ratio. It works perfectly during hunting outdoor activity and for defense. Blade with Drop Point profile with wave-shaped cutting edge.
BFO CD Black Stone Washed, slim and ultra-light 50 g universal EDC folder. BF0 CD is the smallest Extrema Ratio folding knife from the Basic line. Drop Point blade made of Böhler N690 steel and technopolymer handle. Metal left/right tip-up clip.
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