IRWIN Jobber Drill Bit 5/16 in Dia 4-1/2 in OAL Spiral Flute 1-Flute 5/16 in Dia Shank Cylinder Shank

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High-speed steel with black oxide treatment that reduces friction between bit and workpiece. Split point starts on contact in metal, wood and plastic; eliminates walking or skating when drilling into metal; 135 deg split point on all bits above 1/8 in ; jobber length.

Features
  • 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
  • Black oxide coating resists corrosion
  • 135 deg split point ensures a true start and eliminates bit walking
Application

For general metal drilling

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