Precise and clean way to create holes in order to install driver assist sensors on replacement bumpers. Designed to punch a hole in the bumper or fender without damaging the paint. Able to cut holes in plastic bumpers up to 5mm in thickness Kit includes: 5/16" HSS Drill bit to create a guide hole Varied discs that can punch holes in the following sizes: 17mm, 18mm, 18.2mm, 19mm, 20mm, 22.5mm, 24mm, 26mm, 26.7mm, & 32mm