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 180mm Petty is a great length of knife for using as a small slicer or in tight situations where a larger knife would be unwieldy. Heat-treated to an HRC of 61, these blades are attached to an octagonal Ho wood handle with a blond Buffalo horn ferrule. As with all of our Konosuke knives, this comes with the option of a Saya.