Zwilling Four Star series is one of the world's most popular knife lines. Four Star knives were designed and developed in close cooperation with renowned professional chefs. The result was a fully forged knife with a unique molded handle. This entire collection features precision forged knives made from a single piece of Zwilling exclusive high carbon stainless steel. As a result, the knives have improved quality consistency, lasting sharpness, and perfect geometry. In addition, the steel blade goes through a special ice-hardening process called Friodur. This process changes the molecular structure of the steel improving the cutting properties providing a remarkably sharp blade and ensures a long lasting cutting edge.