Irwin Step Drill Bit, Type: #13 UNIBIT Step Drill, Size: 1-1/8", Number of holes: 1

Irwin Step Drill Bit, Size: 11-7/8", Number of holes: 1

Irwin Step Drill Bit, Type: 1T 13 Hole Sizes (1/8"-1/2 ), Size: 1/32" Increments

Irwin Unibit-1T titanium-coated step drill covering 1/8 inch through 1/2 inch in 13 step sizes. Titanium coating extends bit life over uncoated HSS step drills. Self-starting tip eliminates pilot...

Irwin Unibit-1 HSS step drill covering 1/8 inch through 1/2 inch in 13 step sizes with self-starting tip. Self-starting tip eliminates pilot drilling on sheet metal and thin-wall material. Used by...

Irwin Step Drill Bit, Size: 10-1/2" standard, Number of holes: 1