Review on 🚗 Ozgoe JF-03 Happy Bell (8 Pack) Magnetic Car Mount Metal Plate – 3M Adhesive, 4 Rectangular & 4 Round (Black) by Michael Jennings

I use these to attach to my phone or other family members' phones/cases for use with magnetic car mounts. They will work, but over time and depending on the temperature and humidity they are exposed to, the adhesive will degrade and you will need to replace it. But they seem to last a long time and with so many in the pack it wasn't expensive to swap out. My daughter placed one directly on her iPhone and then placed her case on top and a magnet that connected through the case to the car mount magnet. So she didn't have the same problem I had with the magnet detaching because it wasn't directly exposed to the moisture and heat of the case. In any case, the magnets are strong enough to attach to other magnets through the case, so that's fine too.