Honma Kagaku Glestain T-Type Gyuto Knife 721TK 21cm Glestain steel, based on 440A, undergoes sub-zero treatment (ultra-low temperature treatment) and several stages of special heat treatment. It achieves high functionality by thoroughly pursuing quality, including corrosion resistance, wear resistance, heat and cold resistance, toughness (strength), hardness stability (HRC58-59 degrees), and sharpness durability. This is a world-renowned product that meets the trust of professionals, totally innovating conventional knives in every aspect. ● Special heat treatment that pursues functionality ● Handle Laminated black reinforced wood with excellent corrosion resistance ● Two-stage special blade shape for good food release The two-stage special shape that highlights the features of Glestain. Air enters the recessed part, reducing friction with the ingredients and achieving excellent food release. ● Special shape improves ease of sharpening The special shape of the sides reduces the sharpening area of the blade, allowing for a new ease of sharpening not found in conventional stainless steel knives. ● Glestain knives are fully sharpened Unlike general simple sharpening, Glestain knives are fully sharpened by specialized technicians one by one. Therefore, they have excellent sharpness, high sharpness durability, and are easy to resharpen. ● Rivets 18-8 stainless steel to securely fix the handle