Irwin 66720ZR Drill Bit, 5/16 in Dia, 6 in OAL, Heavy-Duty, Spiral Flute, Straight Shank

M-2 high-speed steel for strength with black oxide coating for heat and wear resistance in wood, metal or plastic applications. Split point ensures a true start and eliminates bit walking.

• Bit is constructed of M-2 high-speed steel for the excellent combination of strength, heat resistance and wear resistance
• Bit is constructed of M-2 high-speed steel for the excellent combination of strength, heat resistance and wear resistance
• 135 deg split point ensures a true start and eliminates bit walking