4.00mm RHS / RHC HSS 135 Degree Split Point Heavy Duty Screw Machine Length Drill - Steam Oxide Tool Diameter 4 mm O.A.Length 55 mm Decimal Equivalent 0.1575 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