Twin Four Star II enhances Zwilling J.A. Henckels' top-selling knife series worldwide, Four Star, with a stainless steel end cap. This logo-stamped end cap optimizes the balance provided by the bolster, resulting in safety, ergonomics, and comfort. 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. Precision-forged from a single piece of steel, these Sigmaforge knives have an exceptionally sturdy, balanced, and flexible blade. Each knife is honed and hand-finished by the most skilled artisans.