J.A. Henckels Twin Pro S All You Need 9-Piece Block Set and Apron SIGMAFORGE one piece construction ensures perfect geometry, high precision and improved stability of the blade and steel structure. FRIODUR ice hardened Laser controlled and hand honed edge stays sharper longer Ergonomic 3 rivet, Novodur handles bonded to the full tang for comfort and precision Henckels' exclusive high carbon, no-stain steel formula Lifetime warranty