Milwaukee Tool 48-20-9017 Rotary Drill/Hammer Drill Bits; Drill Bit Size (Inch): 5/16 ; Shank Type: Three Flat ; Drill Bit Material: Carbide Tipped; High Speed Steel ; Shank Diameter (Inch): 5/16 ; Flute Length (Inch): 10 ; Flute Length (Decimal Inch