- 8971-A Stepped Drill Bit 13 Sizes: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" (3 to 13mm).
- 8971-B Stepped Drill Bit 9 sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" (6 to 19mm).
- 8971-C Stepped Drill Bit 6 sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" (5 to 13mm).
- Lengths: 3.1/4" (82mm).
3 Piece Self-starting Stepped Drill Set use for starting, making and enlarging holes in metal materials e.g. steel, copper, brass, aluminium and other thin materials.
Stepped Drill Bits are hardened to HRC 62.
Set Contains 3 Stepped Drill Bits as listed below.
Individual Sizes (Available Separately):
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