SpecsSilver & Deming and Reduced Shank Drill Bits; Series/List: R57; Shank Diameter (Inch): 1/2; Drill Bit Size (Decimal Inch): 0.8906; Drill Bit Size (Inch): 57/64; Drill Bit Material: High Speed Steel; Drill Bit Finish/Coating: Bright Series/List R57 Shank Diameter (Inch) 1/2 Drill Bit Size (Decimal Inch) 0.8906 Drill Bit Size (Inch) 57/64 Drill Bit Material High Speed Steel Drill Bit Finish/Coating Bright Shank Type Round with Flats Flute Length (Inch) 3 Drill Point Angle 118 Cutting Direction Right Hand Overall Length (Inch) 6 Specification Designation ANSI Point Type Standard Flute Type Spiral Spiral Type Regular Spiral Number of Flats 3 Through Coolant (Yes/No) No