Chicago-Latrobe - Screw Machine Drill, Heavy Duty, Series: 159, Imperial, 5/64 in - Fraction, 0.0781 in - Decimal Inch, 1-11/16 in Overall Length, 3XD Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 11/16 in Dia Flute Length x 1 in Long Straight Shank, 135 Degree Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Black Vapor Oxide, Applicable Materials: Alloy Steel, Carbon Steel, Cast Iron and Tool Steel