These are the all new Swedish Stainless HH series. HH stands for high hardness. We had Konosuke change the heat treatment of these knives and lifted the HRC to 61. Now you can get great performance and easy sharpening with excellent stainless properties all in one. This Konosuke Wa-Gyuto measures 240mm on the blade and uses stainless steel with a bubinga handle made by our woodworker, Isaiah. The spine is rounded and this knife is very thin and light. The blade is made from Swedish steel, hardened to 61 hrc. The fit and finish on these knives is excellent.