GDMINLO Mount Metal Plate（8Pack） for Magnetic Car Mount Phone Holder with Full Adhesive for Phone Magnet, Magnetic Mount, Car Mount Magnet-8X Rectangular (Black)

So far so good - metal plates come in a nice variety of sizes & shapes, hold very well to magnets, have a good adhesive to stick the plate onto your phone case which upon initial inspection looks like it will last as long as the case itself will last, and the adhesive has not failed under summer heat conditions nor failed under body heat conditions in pants pockets. Is thin to the point of not being noticeable sliding in/out of pockets.

Strong magnetic, for my phone backs. Works well, size is good for magnetic phone holder.

Magnets work well. Price is right

As good as anything you pay a lot more money for. Very happy.

Got these for our work devices since all of our vehicles have magnetic phone mounts. They hold great to the Mount but the adhesive isn’t very strong. Only a week after applying, we’ve had to replace several of them as they bent or came off.