The RAM-B-149Z-UN7PV1U consists of a zinc-coated u-bolt base, double socket arm and universal X-Grip cradle. The base includes cover caps to be placed over the exposed ends of the u-bolt. The mount is designed with a RAM rubber ball and socket system that has adjustment points at both ends of the double socket arm - this allows for almost infinite adjustment and perfect viewing angles. The composite rail adapter can narrow the rail to a minimal width. The 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 cradle expands and contracts, allowing for a perfect custom fit of your cell phone.