Designed for a variety of electronic devices, including marine GPS/sonar, CB radios and ham radios, gimbal brackets, and more. The 2.25" ball and socket system system features an 11" x 3" rectangular plate with different combinations of pre-drilled holes to securely seat your device, and a round 3.68" diameter flat surface base. The rubber ball and socket technology dampens shock and vibration while also providing near-infinite adjustability to achieve a perfect viewing angle. Ball 2-1/4" Length 16"