ZWILLING Professional "S" knives are the classic knives for the professional kitchen. A solid steel, seamless manufacturing and three rivet design with full tang delivers optimum balance and the safe handling. The knives are honed and hand-finished by the most skilled artisans. The laser controlled edge is incredibly sharp. The knives are made of proprietary special formula German steel that has been perfected over the years. Combined with ZWILLING's FRIODUR ice-hardening technique, the result is a harder, sharper blade that will not stain or chip and remains sharp longer. Each knife is precision forged from a single piece of steel using ZWILLING's SIGMAFORGE process. The result is an exceptionally sturdy, balanced, and flexible blade. The bolster provides the right balance and acts as a finger guard. The chef's Knife is the workhorse of the kitchen. Whether chopping, slicing, or dicing, the broad blade and comfortable, balanced size will quickly become the go-to knife for everyday tasks.ZWILLING Special Formula SteelSIGMAFORGE, forged from one single piece of steelFRIODUR, ice-hardened for long lasting sharpnessHand sharpened and polishedEdge angle 15 degrees on each side (10 degrees on Santokus)Laser controlled edgeClassic full bolsterTraditional three rivet handleFull tangDishwasher safe (Hand-washing recommended)Made in Germany.