J.A. Henckels Twin Select 7-Piece Knife Set with Block Sigmaforge one-piece construction ensures perfect geometry, high precision, and improved stability of the blade and steel structure; Friodur ice-hardened Laser-controlled, hand-honed edge stays sharper longer Ergonomic 18/10 stainless-steel handles are comfortable and safe to use Henckels's exclusive high-carbon, no-stain steel formula Lifetime warranty