Review on 12 Pack - 4 Sizes Mount Metal Plate for Magnetic Phone Car Mount Holder with 3M Adhesive - Compatible with Magnetic Mounts (6 Rectangle and 6 Round) - Silver by Maurice Rivera

Including 12 metal plates for attaching a telephone magnet. There are 4 different magnet sizes and 2 different magnet shapes in the colors black and silver. There are 3 of each type where you can find the right size and type for most brands of phones. There are three (3) 2.6" x 1.77" black rectangular magnets, three (3) 1.4" x 1.8" silver square magnets, three (3) 1.4" silver round magnets and three (3) black round magnets. 1.7" in diameter. There is a 3M sticker for you to stick the magnetic plates on your mobile devices. On the black and silver surface of the magnet there is also a transparent one Protective film. I have an iPhone 12 ProMax. I use magnetic plates to hold my phone on a car mount. Holds on with no problems. The magnets are pretty thin so my problem was getting them in place on the back of the phone case .From time to time it would slide down and I had to remove the case to change its position.I had this problem because I don't like attaching a magnet directly to my phone or case.