Screw Machine Drill Bit, Left-Hand, List Number 157L, Number of Pieces 1, High Speed Steel, Bright Finish, General Purpose, Drill Point (Deg.) 118, Fractional Size (In.) 31/64, Decimal Equivalent 0.4844, Flute Length (In.) 2-3/16, Flute Length (mm) 55.5625, Overall Length (In.) 3-11/16, Overall Length (mm) 93.6625, Shank Dia. (In.) 0.4844, Shank Dia. (mm) 12.3038