The popular spring-loaded RAM® X-Grip® phone holder features an 'X' design that expands and contracts to provide a perfect fit for your device – even if it's in a case. Made of high-strength composite and stainless steel, the RAM® X-Grip® phone holder is compatible with a wide variety of RAM® double socket arms and mounting bases. This version of the RAM® X-Grip® fits phones ranging from 1.87" to 3.25" in width and keeps your device completely functional and accessible, and this kit includes a medium length B size double socket arm. No matter what mounting base you pair the RAM® X-Grip® and double socket arm with, RAM® ball and socket technology allows for near-infinite adjustability to achieve the ideal viewing angle – while also extending the life of your phone by providing shock and vibration damping. For outdoor applications – like being used as a motorcycle phone mount – the RAM® X-Grip® includes a device tether that is recommended for added security and peace of mind.