Extrema Ratio

Made to military specs, this folder series was developed to substitute, or compliment, a fixed blade. To reach this result, Extrema Ratio used only the hardest, thickest materials and a very safe, well tested locking system: the Back Lock. To reac...

Made to military specs, this folder series was developed to substitute, or compliment, a fixed blade. To reach this result, Extrema Ratio used only the hardest, thickest materials and a very safe, well tested locking system: the Back Lock. To reac...

The blade is made with NB90 Cobalt Stainless Steel which is a high performance steel with excellent cutting and sharpening characteristics. The blade is a flat grind and has 58HRC hardness.

The KRATON handle is fixed on the tang with a stainle...

Extreme Ratio Knives have produced this knife to the most exacting standards. The tanto style blade is made from N690 stainless cobolt steel and has a polymerical coating with a high level of resistance towards corrosion.

The handle gri...

Extreme Ratio Knives have produced this magnificent knife, with the Tanto style blade made of N690 Stainless Cobalt Steel, which has extraordinary mechanical and cutting features.

The sheaths for this series are available in Black INPAX (sim...