by Irwin
Buy new:
9 used & new from $38.95
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Irwin Unibit Cobalt is made of high speed steel, this step drill bit will last longer in the toughest of materials. Irwin Industrial Tools 10233CB 3 9 Hole Sizes (1/4-Inch-3/4-Inch), 1/16-Inch Increments
- 6 times longer life vs. the competition
- M35 grade Cobalt High Speed Steel
- Radial concave flute
- Speedpoint tip
- Laser marked sizes
Hole sizes: 1/4" - 3/4", 9 steps - 1/16" increments.

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