Product Details: Name: Car Magnetic Plate Holder Style: Square, Round Color: Black Features: Compatibility: These metal plates are not inherently magnetic; instead, they are designed for universal magnetic mounting. Be sure to keep them away from wireless charging sensors while charging to prevent interference. Easy to Install: Each metal plate comes with a strong adhesive backing that easily attaches to your phone or phone case. Installation and removal can be completed quickly without the need for additional tools. Concealed Design: The ultra-thin profile of these metal plates ensures they are virtually invisible when applied to your device. The smooth surfac e minimizes the risk of scratches, making it a perfect alternative to bulky magnetic mounts. Strong Adhesive: The high-viscosity adhesive ensures a long-lasting and secure attachment to your device, allowing you to use your phone in both horizontal and vertical orientations. Multiple Sizes: This set includes 20 metal plates in two different shapes to ensure compatibility with a wide range of devices. The 10 rectangular plates are perfect for larger smartphones, tablets, and GPS devices, while the 10 round plates are perfect for smaller devices. Products include: 20pcs car magnetic sheet holders: 10 square + 10 round Note: Please allow slight size errors due to manual measurement; Please allow slight color errors under different monitors.