The IRWIN Unibit High-Speed Steel Step Drill Set features single-flute cutting edges for greater control and more precise drilling. Three-flatted shanks prevent the bits from slipping in the drill while the non-skid self-starting tips eliminate skidding and the need for center punching. Set includes #1, 2, 4, and 21 size step drills.
Features:
- 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.
