Taper Length Measurement Type Inch Coating Black Oxide 19/32 RHS / RHC HSS 118 Degree Notched Point Heavy Duty Taper Length with Automotive Tanged Shank Drill - Steam Oxide Cleveland List 2540 Heavy-Duty Taper Length with Automotive Tanged Shank Drills Tool Diameter 19/32 inch O.A.Length 8-3/4 inch Decimal Equivalent 0.5938 inch Shank Type Round w/Tang Cutting Edge Material HSS Cleveland