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Irwin® Unibit® Fractional Step Drill; 13/16" - 1-3/8"

Item # 901-786409ORS  Model # 10221
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$94.99 Total Price

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Step Drill Bit maximum life in tough Steel, 13/16 - 1 3/8 in.
  • Type: Hole enlarging
  • Bit diameter: 13/16 - 1 3/8 in
  • Shank type: 3 flatted hexagonal
  • Shank diameter: 7/16 in
  • Number of flutes: 1
  • Single-flute cutting edge for greater control through steps
  • 3 flatted shank prevents slipping in drill chuck
  • Patented single-flute cutting edge gives the user a true round hole every time
  • Also available with titanium nitride coating for longer life
  • Pilot hole required
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