Complete flat surface, drill-down mounting solution with short length D size socket arm compatible with 9"-12" fishfinder gimbal brackets RAM Mounts ball and socket technology allows for near-infinite adjustability Made of Powder-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments Backed by a lifetime warranty The RAM-D-115-C consists of a base with a 2.25” diameter D size ball, a short arm and a 6.25” x 2” marine electronic plate with a D size ball for supporting larger devices. This marine electronic plate contains different combinations of pre-drilled holes and is a direct fit for 9”-12” fishfinder gimbal brackets. Supports devices such as the Lowrance HDS-9 Gen2 Touch, Garmin GPSMAP 7407, Garmin UHD2 and more.