Made with Flexcutâ€TMs high quality spring steel, tempered to a hardness of Rc 59-61, and fitted with tremendously comfortable curved ergonomic ash handles, these knives perform as marvelously while holding a razor sharp edge. All tools are pre-sharpened and ready to use. Set includes: roughing knife, detail knife, #2 skew double bevel 5/16", and a #6 sweep 5/16".