UNIBITA 9/16"-1" High Speed Steel Fractional Step Drill Bit #20

Product Overview

The IRWIN® UNIBIT® HSS Fractional Step Drill Bit is made of high speed steel. Hole sizes are permanently laser-etched on the inside of the flute and will not wear away for easy identification throughout the life of the bit.

Additional Features

  • Patented single-flute cutting edge gives the user a true round hole every time
  • Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
  • Pilot hole required


  • Metal Drilling
  • Hole Enlarging


Product Length
0.39 in
Product Height
0.39 in
Product Width
0.39 in
Product Weight
0.39 lbs



  • Warranty

Unfortunately, this specific product is not eligible for any warranty. Whilst this product is not eligible, further information about our warranties can be located below.


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  • *included on all self-starting sizes except for #1