The RAP-B-138-UN7 consists of a 2.5" diameter round base with the universal AMPS hole pattern, double socket arm and universal spring loaded X-Grip™ holder for cell phones. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at the both ends of the socket arm; this with a twist of the arm knob, allows you can move the mount to your optimum viewing position. The included X-Grip™ cradle has a clean and clever four leg design that sports great holding power without hiding your phone behind foam pads and plastic. The spring loaded X-Grip™ holder expands and contracts, allowing for a perfect custom fit of your cell phone. The perfect compliment to the modern sleek interior of today''s vehicles, the RAM X-Grip™ is the cell phone holder evolved