Head Diameter Inch 316 Number of Flutes 1 Included Angle 60 Countersink Material Solid Carbide Countersink FinishCoating Bright Shank Diameter Inch 316 For highly abrasive and hard to machine materials For production applications in cast iron, alloy steel, or glass reinforced plastics Long running carbide eliminates the high cost of tool changes in production situations Rigid setup a must not suited for hand held applications Tools 38 and over have solid carbide heads on hardened steel shanks