ROOT Car Mount Metal Plates with Adhesive for Magnetic Cradle-Less Mount 2 Rectangle & 2 Round,4 Piece Rectangular metal magnetic plates to attach phone onto car magnet mount Very easy to attach without a hassle Great to use with smartphones and tablets car magnet mounts Works with magnet mounts designed to hold devices with the metal plate Package contains: 2 non-adhesive rectangular plates and 2-round plates with adhesive