Extrema Ratio Knives

Extrema Ratio is specialized in the development and production of professional knives for military, public security and rescue use. We produce high-level military, tactical and hunting knives as well as a great range of solid knives suitable for the toughest of environments, making them a great choice for a survival knife or a backup tool. The range goes from small folders to large Kukris, offering exactly what you expect from a high-end professional tool.