After-sale Service: We will offer a 12 months service, if you have any problems in use, Please contact us at any time, we will respond within 12 hours. Easy to Install: Install on the rear view mirror base, remove the rear view mirror from the mounting base, put the product into the head fixing hole, and then install the rear view mirror back to the base. If the angle is not appropriate after tightening, a spacer can be added to adjust the angle. Excellent Quality: The ball mount base made of aluminum alloy and rubber, anti-corrosion and wear-resistant. Aluminum alloy ball core, TPU wrap molding, has durability and reliability in the most demanding environment. Product Function: The ball socket technology provides nearly unlimited adjustability. The ball mount base can be used with other accessories of the motorcycle bracket, to fix cell phone and satellite navigation device during driving, install action camera to record trips. Suitable Scene: The head Adapter Ball Base fits for RAM mobile phone holders or other double sockets arms, compatible with other mobile phone holders with 1" ball socket design, and can be installed on bicycles, motorcycles, mountain bikes, electric scooters and more.