The bumper drilling kit for parking sensors is easy to use. It allows replacement vehicle bumpers to be perforated cleanly and precisely with the minimum number of tools. The kit caters for 10 different diameters allowing the installation of a variety of common sensors sizes. (17mm 18mm 18.2mm 19mm 20mm 22.5mm 24mm 26mm 26.7mm 32mm). The kit is capable of drilling precise holes in plastic bumpers up to 5 mm thick without damaging the vehicle’s paint. The installation of the sensors is carried out in 3 steps: Quickly cut holes to the right size. Glue the sensor supports. Insert the sensors into their brackets. Kit contains: 5/16 HSS drill bit Centering screw & lock nut 5x push discs 5x upper cutting discs 5x lower cutting discs.