License plate magnets are a type of magnetic assembly that is made using a channel magnet. Typically an 8” channel magnet is dipped or coated with an epoxy, plastic, or rubber to form a protective coating over the entire assembly. These magnetic assemblies are designed to bolt license plates to before they are magnetically attached to cars and trucks. You most commonly see these at your local car dealership when you take a car out for a test-drive. Contact Argus Magnetics if you are looking for high quality magnets for license plates.