Irwin Industrial Tools 10231CB Unibit 1/32-Inch 13-Steps Cobalt Step Drill Bit
Irwin Unibit Cobalt is made of high speed steel, this step drill bit will last longer in the toughest of materials. Irwin Industrial Tools 10231CB 1 13 Hole Sizes (1/8-Inch-1/2-Inch), 1/32-Inch Increments