Taper Length Coating Black Oxide Cleveland List 2510 General-Purpose Taper Length Drills R RHS / RHC HSS 118 Degree Radial Point General Purpose Taper Length Drill - Steam Oxide Tool Diameter R O.A.Length 6-1/2 inch Measurement Type Letter Decimal Equivalent 0.3390 inch Cutting Edge Material HSS Shank Type Round Cleveland