Left-Hand Heavy Duty High Speed Steel Fractional Straight Shank Jobber Length Drill Bit 1/4" Size. 2-3/4" Twist Length. 4" Overall Length. Bulk. Ideal for use with screw extractors 135-degree split point reduces feed pressure and allows for easier penetration without work hardening Bit is constructed of M-2 high speed steel for the best combination of strength, heat resistance, and wear resistance