Features: ---Rectangular 11" x 3" base with built in 2.25" rubber ball* ---RAM ball and socket system - Easily adjusts to your perfect viewing angle ---Compatible with most RAM 2.25" ball (D size) socket arms ---Constructed of powder coated marine grade aluminum ---Genuine RAM Mount: Part # RAM-D-111BU ---Manufacturer's lifetime warranty ---Made in the USA * Rectangular base has pre-drilled holes, including two holes at 180 degrees and three holes at 120 degrees. It contains different combinations of pre-drilled holes which will match up to many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more.