Pro S knives are made with Zwilling J A Henckels special formula high carbon, no stain steel. Pro S offers a classic 3 rivet design, one piece forged construction for perfect weight and balance and an ergonomic novodur handle. These knives are Friodur ice hardened for excellent cutting edge retention and corrosion resistance. The blades are precision honed with a laser controlled edge which provides a sharper knife and a consistent blade angle. Manufactured in Germany, Lifetime Warranty.