Extrema Ratio

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.