RAM Mounts Universal Cell Phone Holder Kit Features Consists of hardware for mounting to either brake/clutch reservoirs and rails that are 0.5 to 1.25 in diameter, double socket arm and universal X-Grip cell phone cradle Designed into the mount is a 1 diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm this with a twist of the arm knob, allows you to move the X-Grip mount to your optimum viewing position. Mounting hardware for brake/clutch reservoirs include both standard and metric mounting bolts Cradle has a four leg design that sports great holding power without hiding your phone behind foam pads and plastic. Expands and contracts, allowing for a perfect custom fit of your cell phone. Includes a device tether recommended for outdoor applications. Compatible with handheld devices Minimum Width 1.875 (Minimum Height 4.25) Maximum Width 3.25 (Minimum Height 2.25) Depth 0.875