Warm notice: this replacement metal phone plate itself is not magnetic; And it is recommended to use these metal plates with universal magnetic mounts; And the metal plates can use with most magnetic car mount holder. Features and please note: if you stick the phone metal plate for magnetic mount on the back of the phone or phone case, wireless charging may be disable; It is recommended to remove it when using wireless charging; And remove it will not leave any sticky residue on your phone. How to use: as long as peel off the film on both sides of the product gently, make sure the surface of the object is smooth and clean it before using, then you can stick them to any smooth place, the longer the adhesive time, the better the stickiness. Strong adhesion: each universal metal plate has adhesives tape and easy to stick onto the back of phone or case, so these plates set your phone on the car mount more easier and securer and you can go hands-free even on the bumpiest of roads. You will get: the metal plate for phone magnet is 6.5 x 4 cm/ 2.6 x 1.6 inch, 12 pieces; Round one 's diameter is 1.6 inch/ 4 cm, 12 pieces, 24 pieces in total; Give you enough options to use with bigger or smaller devices.