The YS-900 Series chef knife is a Hon-Warikomi, clad-blade which has extremely sharp Swedish Sandvik 19C27 stainless steel cutting core that contains a high percentage of carbon. After heat treatment the steel is characterized by a very high Hardness and good wear resistance. Sub-zero treatment makes the blades improve wear resistance, excellent edge retention HRC 60-61. Beautiful finished black plywood are excellent grip and wear well. Half tang constructions with stainless bolster. Proudly made in Seki, Japan.