... friendly.VarietiesRounted Edges Of The Knife,Bevel Knife,Round-bottomed Knife,Straight Knife,Roma Knife, Umbellate knife ... sand area is 40MM,Shank diameter is 12.7 MM.Round-bottomed Knife: The total length is 55MM, ... The sand area is 20MM,Shank diameter is 12.7 ... sand area is 40MM,Shank diameter is 12.7 MM.AdvantageSharp,Wear-resisting degree is high,It ...