The RAM-D-101-ID1U consists of a 3.68" diameter round base, STANDARD length double socket arm and 4.75" square plate. The 3.68" diameter round base has pre-drilled holes, including two holes at 180 degrees and three holes at 120 degrees. The 4.75" square plate contains 4x100mm holes and 4x75mm holes in each corner. Designed into the mount is a 2.25" 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.