Irwin 15104 Unibit-4T Titanium Step Drill 3/16 In to 7/8 In TiN Coated

Irwin 15502 3-piece Unibit titanium-coated step drill set including 1T, 2T, and 3T sizes. Titanium coating extends bit life over uncoated HSS step drills. Bundled set covers common step drill sizes...

Irwin Unibit-4 HSS step drill covering 3/16 inch through 7/8 inch in 12 step sizes with 1/16 inch steps and self-starting tip. Self-starting tip eliminates pilot drilling on sheet metal and thin-wall...

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-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-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...