Irwin 15101ZR Unibit-1T Titanium Step Drill 1/8 In to 1/2 In 13 Steps

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 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-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...

Irwin Unibit-20 cobalt step drill covering 9/16 inch through 1 inch in 8 step sizes. Cobalt construction extends bit life on stainless and hardened steel vs standard HSS step drills. Used by...

Irwin Unibit-5 step drill covering 1/4 inch through 1-3/8 inch in stepped sizes. Larger diameter range than Unibit-1 through 4 supports larger hole drilling in sheet metal and thin-wall material...