Wide Compatibility: These metal plates are compatible with various types of magnetic mounts, including car vent and dashboard mounts. They are the perfect choice for a wide range of smartphones or GPS magnetic mounts. Strong Adhesion: Each metal plate features a strong adhesive backing that securely sticks to your phone case or other devices like tablets and GPS systems, providing stable support. Durable Stainless Steel Material: Made from high-quality manganese steel with a thickness of 0.6mm, these metal plates are sturdy, durable, and resistant to deformation. The smooth surface helps prevent scratches on your devices. Multiple Shapes and Sizes: The set includes both round and rectangular metal plates, suitable for different device sizes. Dimensions: Rectangular – 65x45mm, Round – 40mm diameter. Note: The metal plates are not magnetic. Easy Installation: Simply stick the metal plate on the back of your phone or inside the phone case for immediate use. Note: Avoid placing the metal plate near the wireless charging area to prevent interference with charging.