The RAM-101-SAE1 consists of a 6 inch double socket arm, 2.5" diameter round base with the universal AMPS hole pattern and 2" x 2.5" rectangular base that has pre-drilled holes at each corner of the base plate. Designed into the mount is a 1.5" diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. This kit comes with a backing plate and is a drill-down mount.