Drillco Jobber Length Drill Bit, Series: 600, 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, Spiral Flute, 3-3/16 in Flute Length, Straight Shank, 118 deg Point, Conventional Point, Right Hand Cutting Direction, Carbide Cutting Edge, No Through Coolant, Bright, Applicable Materials: Aluminum, Bronze, Cast Iron, Cast Steel, Hard Copper and Hard Non-Ferrous Metals