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 for electrician and HVAC technician tool kits.
Irwin 10502ZR 3-piece Unibit step drill set including Unibit-1, Unibit-2, and Unibit-3 in HSS construction. Bundled set covers common step drill sizes for electrician, HVAC technician, and...
Irwin Unibit-4T titanium-coated step drill covering 3/16 inch through 7/8 inch. Titanium coating extends bit life over uncoated HSS step drills. Self-starting tip eliminates pilot drilling on sheet...
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-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...
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...