The RAM-D-111U-C consists of a short double socket arm, a 3.68-inch diameter round base, and an 11-inch by 3-inch rectangular base. The round base contains pre-drilled holes, including two holes at 180 degrees and three holes at 120 degrees. The rectangular base features various combinations of pre-drilled holes that are compatible with many electronic devices and mounts, including marine GPS, CB radios, ham radios, gimbal brackets, and more.