Smartphones Metal Plate 12 Pack for Phone Car Mount Holder Cradle with 3M Adhesive (Compatible with Magnetic Mounts) - 6 Rectangle and 6 Round Black

Universal Metal Plate: Easy to use with all magnetic car mount holders.
Package Includes:
Rectangle: 1.77 x 2.56 (6 pieces);
Round: Diameter 1.57 (6 pieces).
Strong Adhesive: Each metal plate features strong adhesive tape making it easy to stick onto the back of your phone or case without any hassle.
Wide Compatibility: Since all of the metal plates are not magnetic on their own we strongly recommend using them in conjunction with universal magnetic mounts wherever you need them.
Important Note: A metal plate may disable wireless charging if it is attached to the back of your phone or case. It is suggested to remove the case when using wireless charging.