The holder attaches quickly and securely to any flat surface. Push down the lever to engage the suction and youre good to go. Attach the metal plate securely to the back of your device or place it between the device and its cover. Then simply snap it to the magnetic disc of the holder. Its that easy. To adjust, simply move it into the perfect position. Theres no need to fiddle with knobs or dials that eventually shake loose. You position it and it stays in place.