Chicago-Latrobe - Screw Machine Drill, Heavy Duty, Series: 559, Imperial, 3/8 Inch - Fraction, 0.375 Inch Bore - Decimal Inch, 3-1/8 Overall Length, 3XD Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 1-13/16 Flute Length, 3/8 Diameter x 1-5/16 in 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