Step drill, 4 to 12 mm BAHCO 228-SD

Sizes: 4-5-6-7-8-9-10-11-12 mm
Common Characteristics
- For making holes in thin metal sheets
- Titanium-nitride coated step drill with a surface hardness that makes the tool last 4 to 5 times longer than ordinary step drill bits. That same surface reduces friction, resulting in a tool that runs cooler and, in effect, self-lubricates whist running dry
- Drills holes from 4 to 12 mm in 1 mm increments
- Shank 1/4" (6 mm)
Technical Data
Diameter A4-5-6-7-8-9-10-11-12  mm
Total length B62  mm
Shank diameter C6  mm
Usable length D40  mm