Popular spring-loaded RAM® X-Grip® phone holder with expandable 'X' design for a secure fit. Compatible with phones 1.87" to 3.25" W and a depth max of 0.875". Made of high-strength composite and stainless steel for durability. Works with RAM double socket arms and mounting bases for versatile setups. Ball and socket system allows near-infinite adjustability for ideal viewing angles. Shock and vibration damping helps extend device life. Includes optional tether for added security in rugged outdoor applications like motorcycle use. Keeps your device fully functional and accessible while mounted.