The RAM-B-138-UN10 Universal X-Grip RAM Mount is a Marine Grade Aluminum Mount with a Flat Surface Screw Down Base and RAM Universal X-Grip IV Cradle for large phones and phablets. The mount is designed with a RAM 1 inch diameter patented rubber ball and socket system that has adjustment point at the cradle and base. With a twist of the arm knob, you can move the Universal X-Grip mount to your optimum viewing position.