The popular springloaded RAM® XGrip® 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 highstrength composite and stainless steel, the RAM® XGrip® phone holder is compatible with a wide variety of RAM® double socket arms and mounting bases. The smaller RAM® XGrip® fits phones ranging from 1.87" to 3.25", and the larger holder will support phones ranging from 1.75" 4.5". No matter what double socket arm and mounting base you pair the RAM® XGrip® with, RAM® ball and socket technology allows for nearinfinite 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® XGrip® includes a device tether that is recommended for added security and peace of mind.