Features:

1. It will never fall off from the car air vent, it can hold your phone in the place securely and firmly.
2. Standard 17mm diameter joint ball can fit for most car phone holder and wireless car charger mount.
3. We upgraded to the retractable metal hook, it will be much stronger, make the phone holder stay in the place.
4. We increased the maximum extendable length of the hook so that it can fit more cars' vents; also reduced the height of the hook to make it easier to install and remove.