Irwin 4pc Unibit Step Drill Bits - 10228
- Single-flute cutting edge for greater control through steps
- 3 flatted shank prevents slipping in drill chuck
- Non-skid self-starting tip eliminates skidding and the need for center punching.
- #1T Bit: Hole Sizes 1/8" - 1/2"
- 4-piece set includes: HSS #1, 2, 3, plus #1T
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