Irwin Unibit Step Drill Bit
The Irwin Unibit step drill bit is a high speed steel tool designed for enlarging holes in sheet metal, thin gauge steel, aluminum, and plastic. The step design allows a single bit to drill multiple hole sizes, reducing the need to change bits.
Specifications
- Brand: Irwin Unibit
- Material: High Speed Steel
- Size: 8
- Steps: 8
- Range: 9/16 in. to 1 in.
- Application: Fractional Hole Enlarging
Applications
Ideal for electricians, sheet metal workers, and general contractors who need to drill or enlarge holes in electrical boxes, panels, switch plates, and thin metal substrates. The step design creates clean, burr-free holes without the need for multiple drill sizes.

