The HD line from Konosuke is made from a proprietary semi-stainless steel to provide that extra protection from discoloration. Just wipe it dry after using the knife and you're good. This 120mm Petty is excellent for meat trimming or as a paring knife. Heat-treated to an HRC of 61, these blades are attached to an Ebony wood handle with a Water Buffalo Horn ferrule. As with all of our Konosuke knives, this comes with the option of a matching Saya.