Engineered with 3M Adhesive for long lasting and stable hold, these plates set your phone on the car mount easier and securer so you can go hands-free even on the bumpiest of roads. | Features smooth edges that won't scrape your hands and are designed for one hand mounting and strong magnetic hold. | Installs and removes in a snap and will not leave any sticky residue on your phone or phone's case. | Paper thin plates, that leave no detectable bulk to the phone or phone case. Perfect replacement for magnetic car mount kits. | 12-Pack set includes 6 Rectangular and 6 Round Plates giving you enough options to use with bigger or smaller devices.