Drillco 400N120 Jobber Length Drill Bit, 400N Series, Heavy-Duty, Fractional Drill Size: 5/16 Inch, Point Angle: 135 deg, Point Type: Split, Molybdenum High Speed Steel, Grade: M-7N, Black And Gold, Flute Length: 3-3/16 Inch, Shank Type: Straight, Shank Diameter: 5/16 Inch, Shank Length: 1-1/3 Inch, Overall Length: 4-1/2 Inch