Chicago-Latrobe - Screw Drill, Heavy Duty, Series: 559, Imperial, 7/16 in - Fraction, 0.4375 in - Decimal Inches, 3-7/16 in Overall Length, 3XD Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 2-1/16 in Flute Length 7/16 in Diameter x 1-3/8 in on L Shank, Straight Shank, 135 Degree Point, Split Point, Right Hand Cutting Direction, M42 HSS-Co 8 Cutting Edge, M42 HSS-Co 8, Straw, Applicable Materials: Alloy Steel, Carbon Steel, Cast Iron and Tool Steel