Drill America Jobber Length Drill Bit, Economy Heavy Duty, Series: DWDCO, Imperial, 5/16 in Drill - Fraction, 0.3125 in Drill - Decimal Inch, 4-1/2 in Overall Length, 3-3/16 in Cutting Depth, 2 Flutes, 3-3/16 in Flute Length, Round Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, Cobalt Cutting Edge, Cobalt, Gold, Applicable Materials: Stainless Steel, Inconel and Titanium