The RAM-B-138-MA14 consists of a double socket arm, 2.5″ diameter round base with the universal AMPS hole pattern, diamond adapter base and custom high strength composite cradle for the Magellan eXplorist 510, 610 and 710. Designed into the mount is a 1″ diameter patented rubber ball and socket system with adjustment points at the base and cradle. With a twist of the arm knob, you can move the Magellan eXplorist mount to your optimum viewing position.