The RAM-B-111-238U consists of a double socket arm, 2.43" x 1.31" diamond base and 6.25" x 2" rectangle base. The diamond base contains two holes 1.912" from center to center, positioned at both ends of the base. The rectangle base 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.