Bahco 228-SD Step Drill 4mm-12mm

For making holes in thin metal sheets
Titanium-nitride (TIN) 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 effective, self-lubricates while running dry
Self-centring point
Drills holes from 4mm to 12mm in 1mm increments
Shank 1/4" (6mm)