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IRWIN® Unibit® 7/8" - 1 1/8" X 1/2" X 3/4" Titanium Nitride HSS 2 Hole Self-Starting Step Drill Bit With 7/16" Hex Shank And 1 Flute (For 1/2" And 3/4" Knock Out) (Carded)

Airgas Part #:VIS10239


Manufacturer #:10239


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$54.53 /Each
Package Size: 1 Each
$54.53 Each
$54.53 Each
$272.65 Carton 5 Each / Carton

Typically in Stock

Item Details

  • IRWIN® Unibit® Size 9 2 Hole 7/8" and 1 1/8" Self-Starting Step Drill Bit with 1/2" and 3/4" increments features single flute cutting edge for greater control through steps and new speed point tip that penetrates faster than previous unibits and prevents walking. 2 Steps drill bit with hex shank prevents slipping in drill chuck and has 1/8" maximum material thickness that is ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates.


  • SpeedPoint® tip for fast start
  • Geometry of single-flute cutting edge drills true round holes and provides maximum step control
  • Single-flute cutting edge for greater control through steps
  • Hex shank prevents slipping in drill chuck
  • Also available with titanium nitride coating for longer life
  • New SpeedPoint tip penetrates faster than previous Unibits and prevents walking


  • Stainless steel
  • Copper
  • Brass
  • Aluminum
  • Plastic
  • Laminates

Product Attributes

Drill Type

» Step Drill Bit

Shank Size

» 7/16"

Shank Style

» Hex


» 1

Drill Material

» High Speed Steel

Drill Coating

» Titanium Nitride

Trade Name

» Unibit®