> General-purpose rough-seated end mill that can process steel from stainless steel to aluminum. With aluminum, it is possible to go with saying efficiency priority without worrying about conditions such as cutting speed and feed per blade, but if you do not keep the conditions firmly in mild steel (SS 400), there is a tendency for life to become extremely shorter It seems to be. It may be considerably painful as it becomes sten. The price is also reasonable price, but if there is no need to ask for toughness dare to use other cheap (disposable) carbide may be better. > A special nick will give you a machined surface that is similar to a medium finish. Well, it's only when used as a medium finishing .... Roughness is rough.