Irwin 10231 Unibit-1 HSS Self-Starting Step Drill 1/8 In to 1/2 In 13 Steps

Irwin Unibit-10 HSS step drill at 1/2 inch in single step size with self-starting tip. Single step bit produces 1/2 inch holes in sheet metal and thin-wall material. Self-starting tip eliminates...

Irwin Unibit-2 HSS step drill covering 3/16 inch through 1/2 inch in 6 step sizes with self-starting tip. Self-starting tip eliminates pilot drilling on sheet metal and thin-wall material. Used by...

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-3 HSS step drill covering 1/4 inch through 3/4 inch in 9 step sizes with self-starting tip. Self-starting tip eliminates pilot drilling on sheet metal and thin-wall material. Used by...

Irwin Unibit-20 HSS step drill covering 9/16 inch through 1 inch in 8 step sizes. Step drill bores progressively larger holes through sheet metal and thin-wall material in a single bit. Used by...