The RAM-B-176-A-UN10U consists of a fork stem base, a short double socket arm, and a universal X-Grip cradle for large phones. The included X-Grip cradle features a clean and clever four-leg design that provides excellent holding power without obscuring your phone behind foam pads and plastic. The spring-loaded X-Grip cradle expands and contracts, allowing for a perfect custom fit for your cell phone. The X-Grip includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case, sleeve, or skin when determining the overall size. This part is designed to fit into the cylindrical bore wall of fork stems and will work with stems that measure from 12 to 33mm (0.5" to 1.29").