Description
Use the Irwin Unibit step drill bit to drill 7/8 in to 1 1/8 in dia holes. Its 7/16 in L hexagonal shank prevents slipping of the drill chuck. The high speed steel step drill bit has high tensile strength.
- 2 hole sizes
- High speed steel fractional
- Single-fluted cutting edge for greater control and rounder holes
- Ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood and laminates
- 3-flatted shank won’t slip in chuck
- Speedpoint tip for fast starting
- Laser marked sizes won’t wear off with use
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