Irwin Unibit 10231CB Step Drill Bit Cobalt Alloy Steel 1-1/8" - 1/2"

This IRWIN Unibit #1 Cobalt Alloy Steel Step Drill Bit is engineered with M-35-grade Cobalt Alloy Steel steel for maximum life when drilling in tough steel. Laser-marked sizes enable easy reading. The radial concave flute design helps ensure an effective use of drilling power.

Earn 25 Barn Bucks Learn More.
This IRWIN Unibit #1 Cobalt Alloy Steel Step Drill Bit is engineered with M-35-grade Cobalt Alloy Steel steel for maximum life when drilling in tough steel. Laser-marked sizes enable easy reading. The radial concave flute design helps ensure an effective use of drilling power.