This strong magnetic ring is useful for various purposes.  Attach your magnet base to a designated area, then apply the thinner metal magnetic plate to the back of your mobile device.

As shown in photos, you can attach you mobile device, keys (keyring), or any items that has magnetic charge.  

Color: Black/Silver

Material: Aluminum alloy

Size: 4cm diameter x 4mm thick

Weight: <42g

Internal magnets: 8

Application scope: Dashboard/Air Vent, Walls, any other flat surfaces, waterproof magnetic surface