Review on 📱 SALEX Replacement Metal Plates Set (16 Pack) for Magnetic Car Phone Holders, Wall Mounts, Air Vent Holders, Cases, Magnets. Kit of 8 Black Round and 8 Rectangular Iron Discs Without Holes. 3M Adhesive Backing by Dante Jeppi

These discs are thicker than the ones that come with the Joyroom Magnetic Holder This may mean that they attract the magnet more strongly But it can also cause some problems with a cause tight-fitting cases. They're only painted on one side. It probably doesn't matter if you connect them directly to your phone. However, if you attach them to the inside of the case and the case is transparent, they're silver instead of black. But you get a lot of hard drives for $$$ But then again, these things are cheap to make and probably too expensive for most people.