Chicago-Latrobe - Screw Machine Drill, General Purpose, Series: 157, Imperial, 5/16 in - Fraction, 0.3125 in - Decimal Inch, 2-13/16 in Overall Length, 3XD Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 1-5/8 in Flute Length, 5/16 in Diameter x 1-3/16 in. L-Shank, Straight Shank, 118 Degree Point, Radial Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Bright, Applicable Materials: Alloy Steel, Carbon Steel, Cast Iron and Non-Ferrous Materials