features & benefits: these parking sensor and lens hole maker  is the precise and clean way to create holes in order to install driver assist sensors on replacement bumpers. easy to use with a wide variety of sizes make this tool a must have for any shop. hole sizes: 17mm, 18mm, 18.2mm, 19mm, 20mm, 22.5mm, 24mm, 26mm, 26.7mm, & 32mm cut clean through the bumper stack the discs