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 whist running dry|Drills holes from 4 to 12 mm in 1 mm increments|Shank 1/4″ (6 mm)
