CHICAGO-LATROBE 49211 Screw Machine Drill Bit Standard List Number 159 Number of Pieces 1 Heavy Duty Grade High Speed Steel Black Oxide Finish Split Point Drill Point (Deg.) 135 Fractional Size (In.) 11/64 Decimal Equivalent 0.1719 Flute Length (In.) 1-1/16 Overall Length (In.) 2-1/8 Shank Dia. (In.) 11/64 For Alloy Carbon And Tool Steels And Cast Iron Meets/Exceeds National Aerospace Standards (NAS) 907 Type C