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IRWIN® Unibit® 1/8" - 1/2" X 3 3/16" X 1/4" Hex Shank Titanium Nitride Coated Step Drill Bit

Airgas Part #:VIS3018005

Manufacturer Part #:3018005

$149.41 /Each
Package Size Options
$149.41 Each
$597.64 Carton 4 Each / Carton

Item Details

  • IRWIN® Unibit® Size 1 13 Hole 1/8" - 1/2" Self-Starting Step Drill Bit with 1/32" 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. 13 Steps drill bit with hex shanks 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

Product Attributes

Drill Type

» Step Drill Bit

Drill Diameter

» 1/8" - 1/2"

Overall Length

» 3 3/16"

Shank Size

» 1/4"

Shank Style

» Hex


» 1

Drill Material

» High Speed Steel

Drill Coating

» Titanium Nitride

Trade Name

» Unibit®