DEWALT DD4115B12 Drill Bit, Machine, 15/64 In, Cobalt, PK12. More details: Drill Bit, Screw Machine Length, Number of Pieces 12, M42 Cobalt Grade, Cobalt, Straw Finish, Split, Drill Point (Deg.) 135, Fractional Size (In.) 15/64, Metric Size 0.234375, Decimal Equivalent 0.234375, Flute Length (In.) 1 5/16, Flute Length (mm) 33, Overall Length (In.) 2 7/16 In., Overall Length (mm) 62, Shank Dia. (In.) 15/64 In., Shank Dia. (mm) 5.953125, Drilling, Meets/Exceeds Meets All ASI Specs Except Flute Length, Flute Length is Shorter Than ANSI Spec, Package Quantity 12