Four star Zwilling JA Henckels 18cm chefs knife. A SIGMAFORGE knife, precision forged from a single piece of NO-STAIN special formula steel. Specialised FRIODUR ice-hardening process for robust durability and flexibility. V-edge honing with laser-controlled precision to 30 degree angle. Approx. 55-57 HRC Rockwell. Slim, traditional handle with 3/4 concealed tang. Centre of balance: front of knife.