A 3.68″ diameter round base, double socket arm and 11″ x 3″ rectangular plate. The round base has pre-drilled holes, including two holes at 180° and three holes at 120°. The plate has 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.Includes the RAM Hi-Torq™ Wrench; designed to give an extra tight grip with the knob on “D” size ball arms and mounts. Ideal when using the RAM mounts in cold weather or if you just want extra torgue.