The RAM-316-3-2461U consists of the RAM POD III No-Drill vehicle base, 3 rigid aluminum legs, double socket arm, 2.5″ round base that contain the universal AMPs hole pattern and 3.625″ square base that contains the VESA hole pattern. The base of the mount connects to your seat rail without any drilling necessary. The rigid aluminum rod legs can be bent to position your device to its optimum viewing location. The mount is designed with a RAM 1.5″ diameter 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 square base includes a 75mm X 75mm VESA hole pattern with 1.5″ rubber ball positioned 0.88″ from the center of one edge.