Zwilling J.A. Henckels Four Star II 9-Piece Knife Set with Block Sigmaforge one-piece construction; Friodur ice hardened Laser-controlled, hand-honed edge to stay sharper longer Polypropylene handles with logo on stainless-steel endcap Henckels's exclusive high-carbon, no-stain steel formula Dishwasher safe but hand washing recommended for all fine cutlery