features an extra-strong gooseneck with an anti-shake stabilizer. It stand securely and easily on all round car cup holders and removes the phone car mount by expandable the base without leaving any nasty marks. This cell phone cup holder for car always stable and not shake on any bumpy roads. Best Driving Asistant: The top of the pole has 360째 rotation and the clamp part supports a 360째 rotation. Besides, the gooseneck can be adjusted from 7-13 inches. You can adjust the height of your needs to get the best driving perspective and reduce driving fatigue. More comfortable to use hands-free, GPS and more. Ultra-Sturdy Quality: In order to obtain a better driving experience and eliminate the problem of shaking while driving, this cup holder phone mount selected MILITARY-GRADE material ALUMINUM ALLOY and components lab-tested to ensure sturdiness, security to your driving safety. After 5000+ testing,(About hit, bumpy road, shake test) the gooseneck can hold up 50 Ib. The cup holder phone mount no broke and the parts no fall off. And the cell phone no drop. Universal Stable Cup Holder Mount: Expandable wider base with three protruding extension structures and non-slip silicone, forming a triangular locking structure without popping out. The adjustable mounting base has 3 rubber padded claws that install in different cars properly, doesn't shake even on bumpy roads