Large Handheld Electronics Holder. Opening is oval in shape. Interior Dimensions at the widest point are 3.15”x1.8”. Top ring has an additional ¼” clearance for belt clips. Overall Height 4.4”. Comes with universal mounting bracket which allows the use of a variety of accessories in one location. Mounting bracket permanently mounts to 1 ¼” square rail commonly found on pontoon boats. No drilling required. All mounting hardware included.