Skip to product information
1 of 4

Extrema Ratio

Extrema Ratio ECM Cobra Böhler N690

Regular price €375,00 EUR
Regular price Sale price €375,00 EUR
Sale Sold out
Tax included. Shipping calculated at checkout.

EXTREMA RATIO E.C.M. (Einsatzkommando Cobra Messer) is a fixed blade multipurpose knife, designed for operational uses for the renowned special unit Einsatzkommando “Cobra” of the Austrian police, whose logo is laser engraved on the heel of the blade. Extrema Ratio E.C.M. combines the features of a useful tool to the ones of a reliable blade, in a compact configuration with a total weight of 240g. The blade is built in Böhler N690 steel, hardened to 58 HRC and is 116mm long, 5mm thick and flat wire. The profile of the blade is of the modified spearpoint type, with a false counter-thread ¾ in length on the back and a lower guard to protect the hand during use. Both the guard and the knob have holes to facilitate the fastening of the knife to various tools or for the passage of laces. The blade has a surface coating in DLC (Diamond-Like Carbon) Carbon-based making it hyper-resistant to abrasion and chemical aggression. Given the burdensome use of the tool, for the grip the more powerful high-resistance G10 has been used, instead of the usual Forprene. It is fixed to the FULL TANG profile by two passing screws and maintains all the known ergonomic features of the Extrema Ratio handles. Since this is a knife realized for professional applications, great relevance was given to ease of carrying it, accessibility and rapid extraction. The polymeric sheath is adaptable and can be carried on a service belt or mounted on M.O.L.L.E. panel of tactical vests, backpacks or other equipment.


Blade steel: Böhler N690
Blade length: 116 mm
Blade thickness: 5.0 mm

Handle material: G-10
Total length: 233 mm

Weight: 240 grams