Description
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 whilst running dry|Drills holes from 4 to 22 mm in 2 mm increments|Shank 3/8″ (10 mm)
