The RAM Mount Mount for Lowrance Elite-4 and Mark-4 Fishfinders consists of a double socket arm, 2.5 in. diameter round base with the universal AMPS hole pattern and adapter base that inserts directly to the back of Lowrance Elite-4 and Mark-4 Fishfinders. The adapter serves as a quick release mechanism, allowing you to remove or transfer your Fishfinder in seconds. Designed into the mount is a 1 in. diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm; this with RAM's rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles.