Milwaukee Step Drill 4-12/1mm-1 Piece (48899301)

Description

Genuine Milwaukee · Part no. 48899301

This Milwaukee step drill (48899301) cuts round holes from 4 to 12 mm in sheet metal, plastic and similar material up to 4 mm thick, all with one bit. On a car it is the tool for neat cable holes: a grommet for a dash cam or reversing camera lead, a switch in a plastic panel, or opening up a hole a bracket doesn't quite match.

Good to know

• What should I check before drilling? Look behind the panel for wiring looms, pipes, airbag parts and the fuel tank, then mark the centre. The Rapid Strike tip starts without a punch or pilot hole, so it is less likely to skate across paint.
• How do I stop at the right size? The step sizes are laser marked; drill until the step you want has just finished cutting, then stop. The steps deburr as they cut, so the edge comes out clean.
• Anything to do afterwards? Paint or treat the bare edge of a hole in steel bodywork so rust can't start there, and fit a grommet before passing any cable through.

Which one?

For bigger holes such as cable glands and panel sockets, the Milwaukee Step Drill 6-35MM-1 Piece (48899335) goes up to 35 mm; for thicker steel, twist drills such as the Milwaukee Metal Drill HSS-G TW 19 Piece Set CB (4932499766) suit better.

Key features

• One bit for holes from 4 to 12 mm
• For material up to 4 mm thick
• Rapid Strike tip starts without a pilot hole
• Steps drill and deburr in one go
• Three-flat shank resists slipping in the chuck
• Black oxide coating, laser-marked sizes

Specification