Twin Signature knives are precision stamped from a single piece of German steel, resulting in lighter-weight knives that do not compromise sharpness. The knives are made of proprietary special formula steel that has been perfected for over 280 years. Combined with Zwilling's signature ice-hardening technique, these Friodur blades are harder and sharper, they will not stain or chip and they retain their sharpness longer. To ensure an ideal cutting angle, the laser-controlled edge is incredibly sharp and is honed and hand-finished by the most skilled artisans. The three-rivet handle embedded with the Zwilling J.A. Henckels logo provides optimum durability.