2.5" diameter round bases with the universal AMPS hole pattern, LONG double socket arm and universal X-Grip^® clamping cradle for tablets. The mount is designed with a RAM patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The X-Grip^® clamping cradle consists of a composite spring loaded cradle, expandable grip arms and additional bottom support keeper. Included are extra easy access grip knobs, located on the back of the cradle for quick release of your tablet. The X-Grip^® clamping cradle expands and contracts for perfect fit of most tablets with or without sleeves, as well as some smaller tablets. Please verify dimensions of your tablet below for compatibility with the X-Grip^®.