Review on 180° Rotating Magnetic Smartphone Mount for Compatibility by Gotdat Burton

Warning! If you use them on metal it may start to smoke. I saw smoke coming out when I realized it had somehow attached itself to the metal head of the screw. He melted the plastic around the same time, but it could have been worse. If I weren't there, our house could burn down. scary. For safety reasons, short-circuit detection must be available.