This magnetic license plate holder is absolutely the best magnet you can get coated with a blue rubber coating. These magnets have amazing holding power and will not scratch your vehicle. Utilizing strong magnets they securely adhere to all metallic surfaces of rear deck - trunk lids, bumpers, and tailgates. The rubber outer coating prevents scratches. High quality hardware included. Fits standard United States license plates. The rubber coating on these blue magnets are consistent and level and not rounded like you will find with the other poly coated magnets. 2 magnets per plate recommended.