Lifetime WarrantyThis double socket arm comes with lifetime warranty, if you have any questions, please feel free to contact us, we will provide you with the best solution within 24H. This 17mm ball cradle adapter connects the phone holder base and phone clip to form a complete sports camera holder, Gamin GPS mount, car phone holder etc. It's perfect Christmas gift for your husband, father, son, or friend, bringing them the freedom and surprise of freeing their hands. Compatible with Garmin gps mount and 17mm ball head adapterDouble socket arm connects to all brands 17mm ball head, compatible with Garmin ball mount, 62mm in length, suitable for quadlock motorcycle mount, bike stem phone mount, live streaming phone mounts, riding photography mount and other devices that have 17mm ball assembly, if you need to mounting GPS devices or surveillance camera that has 17mm ball head to Marine Cell Phone Holder, this 17mm ball head adapter is perfect choice. Long service