Chicago-Latrobe - Screw Machine Drill, Heavy Duty, Series: 559-TN/2559, Imperial, 1/8 Inch - Fraction, 0.125 Inch Bore - Decimal Inch, 1-7/8 Overall Length, 7/8 Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 7/8 Flute Length, 1/8" Diameter x 1 in L Shank, Straight Shank, 135 Degree Point, Split Point, Right Hand Cutting Direction, M42 HSS-Co 8 Cutting Edge, M42 HSS-Co 8, TiN Coating, Applicable Materials: Carbon Steel, Cast Iron and Tool Steel