The HD line from Konosuke has the same dimensions as the White #2 line, but is made from 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 is a great vegetable cleaver. Perfect for large amounts of vegetable prep or when you just need a few julienne carrots. Heat-treated to an HRC of 61, these blades are attached to an octagonal Ebony wood handle with a blonde Buffalo horn ferrule.