RAM Double Ball Mount for Lowrance Elite-4 & Mark-4 (RAM-B-101-C-LO11) (sku 54476)The RAM B 101 C LO11 consists of a 2. 5" diameter round base with the universal AMPS hole pattern, LONG double socket arm and adapter base that inserts directly to the back of Lowrance Elite 4, Mark 4 and Hook 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" diameter patented rubber ball and socket system with adjustment points at both socket