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Irwin® Unibit® 15221 Hole Enlarging Step Drill Bit, 13/16 in Dia Min Hole, 1-3/8 in Dia Max Hole, 10 Steps, HSS, 10 Hole Sizes, 7/16 in Shank

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Features

  • 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
  • Geometry of single flute cutting edge drills true, round holes and provides maximum step control
  • Laser etched sizes inside flute for easy and permanent hole size identification
  • Pilot hole required
  • Titanium nitride coating resists heat and friction, extending the cutting edge life up to six times longer than other high speed steel step drill bits
  • SpeedPoint® tip for fast starts

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Description

Irwin® Unibit® Step Drill Bit, Hole Enlarging, Imperial, 13/16 in Diameter Minimum Hole, 1-3/8 in Diameter Maximum Hole, 10 Steps, 1/8 in Step Depth, 10 Hole, 1 Flutes, 7/16 in Shank, 3-Flat Shank, SpeedPoint® Point, HSS Cutting Edge, HSS, TiN, Applicable Materials: Aluminum, Brass, Copper, Laminates, Plastic and Stainless Steel