For the mastercut scales guts, Oneway Cobalt has added to the steel. This creates the steel called by Hamlet 2060 and Crown calls it Pro PM. It is a guts that holds its sharpness extremely long. These guts are delivered without handle. That's fine because in this way you can make yourself easily recognizable handles and don't get wrong. If these guts are delivered they must first be sharpened. If you write what section you want to have on the chisel in the "comments on your order" box, I can do it for you too. To clamp this guts into the OneWay chisel handle you need an adapter.