MARXMAN Jobber Length Drill Bit, Heavy Duty, Series: 330C, Imperial, 5/16 in Drill - Fraction, 0.3125 in Drill - Decimal Inch, 4-1/2 in Overall Length, 3-3/16 in Cutting Depth, Standard Flute, 3-3/16 in Flute Length, 5/16 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, Cobalt Cutting Edge, No Through Coolant, Cobalt, Uncoated, Applicable Materials: Ferrous Casting, High Alloy Steel, Inconel, Stainless Steel and Titanium