Konosuke HD 210mm Wa-Gyuto. The HD line from Konosuke has the same dimensions as the White #2 line, but is made from a proprietary semi-stainless steel to provide that extra protection from discoloration. Care does need to be taken to prevent rusting, but these knives take on a great patina which will also help to curb discoloration. This 210mm Gyuto is hands down, the most popular knife amongst home cooks. It is the perfect size for the home kitchen or when cutting board real estate is at a premium. It is the all-around multi-tasking blade and great for so many jobs. Heat-treated to an HRC of 61, these blades are attached to a stabilized octagonal Ho wood handle with a Water Buffalo Horn ferrule. As with all of our Konosuke knives, these come with the option of a matching saya.