Extrema Ratio is an Italian manufacturer of tactical and combat-oriented fixed blade knives, known for designs rooted in military and professional use. Their lineup spans from compact utility blades to larger field and survival knives, with a focus on robust construction and purposeful aesthetics. Extrema Ratio knives typically feature quality stainless or tool steel blades, secure blade geometries suited to hard use, and handle materials built for durability in demanding conditions. The brand's product range reflects both traditional fixed blade design and modern tactical thinking, with models like their trench knives and expedition-grade blades appealing to users who prioritize reliability and function over decorative refinement. While positioned at mid to premium price points, Extrema Ratio offers considerable depth of selection - their catalog spans from affordable entry-level fixed blades to high-end collector and professional-grade pieces. If you're looking for Italian-made tactical fixed blades with serious field credentials and straightforward, no-nonsense design, Extrema Ratio delivers consistent quality across a broad range of applications and budgets.