3.10mm RHS / RHC HSS 135 Degree Split Point Heavy Duty Screw Machine Length Drill - Steam Oxide Tool Diameter 3.1 mm O.A.Length 49 mm Decimal Equivalent 0.122 inch Measurement Type Metric Coating Black Oxide Shank Type Round Cle-Line Cle-Line List 1896 Heavy Duty Screw Machine Length Drills Cutting Edge Material HSS Screw Machine