Two magnetic metal plates comes with this dash phone holder. One is retangular and the other is round. You can choose the metal plate based on the road conditions and the size of your phone. The self-adhesive metal plate can be struck to the back of your phone or protective case. Or you can put it between your phone and the case. Note: The metal plates will affect wireless charging. Please don't stick them to the center of your phone, if you need to use wireless chargingMinimalist Design & Infinite Flexibility: The Go-Des Magnetic Dashboard Adhesive Holder features a super small size and seamlessly integrates into your car interior without causing any disturbance to car accessories or driving views. The 360-degree rotatable magnetic ball makes it possible to tilt and rotate your phone to any orientation freely, no matter vertical or horizontal. The magnet car holder allows you to adjust the phone to an optimal angle for navigation.Solid Quality & User-Friendly: The Car Dashboard Magnetic Sticky Phone Mount adopts aluminum alloy as base that is solid enough to support your phone's weight firmly. The silicone pad protects the phone from slipping and scratching. The 4 neodymium magnets are arranged so scientifically that the magnetic holder won't cause interference with your phone's navigation signal, communication signal etc, keeping you online all the time.Reliable Stability & Safety: Go-Des Car Dashboard iPhone Mount combines 4 powerful neodymium magnets with super sticky 3M adhesive. The Magnetic Sticky Phone holder attaches to your car dashboard firmly and secures your phone in place even on bumpy roads or sudden braking, offering amazing stability and safety to your phone. Two different magnet metal plates can be chosen based on the road conditions and your phone's size.