The RAM-B-107U consists of a 2.5" diameter round base with the universal AMPs hole pattern, double socket arm and connecting Humminbird/Apelco marine adapter base. The mount is designed with a RAM 1" 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 RAM-B-107U is a "LIGHT USE" mount, designed to hold smaller marine electronic devices.