Irwin Unibit 1/8" - 1/2" Fractional Step Drill Bit (Model 10231)

The IRWIN® UNIBIT® HSS Fractional Self-Starting Step Drill Bit is made of high speed steel. It features a quick change hex shank that secures easily in the drill chuck. Hole sizes are permanently laser-etched on the inside of the flute for easy identification throughout the life of the bit. This step drill bit can drill a range of hole sizes from 1/8 in. to 1/2 in. with a total of 13 size increments.

Key Features

• Features a quick change hex shank that secures easily in the drill chuck.
• Hole sizes are permanently laser-etched on the inside of the flute.
• Sizes will not wear away for easy identification throughout the life of the bit.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.