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Irwin Unibit 1/2" High Speed Steel Single Hole Step Bit

Brand: Irwin Mfg#: 10310
Product#: 17310310
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Unibit Fractional Single Hole Step Drill Bit, 0.5 in Diameter, NO 10 Wire, SpeedPoint Point, 1 Flute, 0.125 in, Hexagonal Shank, 0.25 in Shank, Self Starting Style, High Speed Steel Cutting Edge, Tin Coated


  • New speedpoint tip penetrates faster than previous Unibits and prevents walking
  • Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
  • Hex shank prevents slipping in drill chuck
  • Also available with (TiN) coating for longer life
  • Single flute cutting edge for greater control through steps


  • Brand: Irwin
  • Product Line: Unibit
  • Applicable Materials: Stainless Steel, Copper, Brass, Aluminum, Plastic and Laminates
  • Material Thickness: .125 in
  • Point Type: SpeedPoint
  • Cutting Edge Material: High Speed Steel
  • Number of Flutes: 1
  • Wire Size: NO 10
  • Shank Size: .25 in
  • Finish: Tin Coated
  • Style: Self Starting
  • Diameter: 0.5 in
  • Shank Type: Hexagonal