The spring-loaded RAM® X-Grip® phone holder features an 'X' design that expands and contracts to provide a perfect fit for your device. Made of powder-coated, marine-grade aluminium, stainless steel components, and high-strength composite, the RAM® X-Grip® phone holder is compatible with a wide variety of RAM® double socket arms and mounting bases. RAM® X-Grip® fits phones ranging from 1.75" to 4.5" in width (depending on your drop-down menu choice) and keeps your device completely functional and accessible. No matter what double socket arm and mounting base you pair the RAM® X-Grip® with, RAM® ball and socket technology allows for near-infinite adjustability to achieve the ideal viewing angle.