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 cradle expands and contracts, allowing for a perfect, custom fit. The mount is designed with a 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double-socket arm; which allows for almost infinite adjustment and perfect viewing angles. The included composite rail adaptor allows mounting to rails a minimum width of 0.5" The X-Grip includes a device tether recommended for outdoor applications. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.