A premium blade material, our PM-V11 tool steel (Rc61-63) has a fine, consistent grain structure that provides significantly greater resistance to damage from both impact and wear than O1 or A2 tool steel, yet is as easy to sharpen as A2. PM-V11 has metallurgical properties particularly well suited for plane blades. It can take a keen edge and hold it at least twice as long as an A2 blade before needing sharpening; once dulled, the edge can be quickly restored using water stones or other common sharpening methods.