Extrema Ratio

These extremely robust folding knives allow one to carry out heavy work generally more adapted to a fixed blade. The blade's locking system is robust and safe, the main mechanism is aided by an added safety catch which can be applied manually.

These extremely robust folding knives allow one to carry out heavy work generally more adapted to a fixed blade.

The blade's locking system is robust and safe, the main mechanism is aided by an added safety catch which can be applied manual...

The MFO is the smaller version of the MF series. It maintains all the characteristics Extrema Ratio are known for; tough, rugged design and precision manufacture. The size of a conventrional pocket knife it fills the gap in the Extrema Ratio range...

This folder series was developed to substitute, or compliment, a fixed blade. With it's well tested locking system: The Back Lock. To reach the maximum level of safety while using the folder and to reduce the risk of accidental closing of the blad...

The ONTOS (from the Greek language "the thing") is a pure field knife, solid and heavy but still compact. A portion of the upper blade is serrated in order to always have a sharp edge ready to be used.

In an emergency situaton, when the...