The RAM-111-247-2 RAM Mount Marine Grade Aluminum Mount, with Square Rail Clamp Base, consists of the 1.5 inch diameter ball and socket system with RAM Universal Rectangular 6.25 x 2 inch Plate. This mount is designed to be a universal mounting solution for large and heavy electronic devices, including GPS, CB Radios, Ham Radios and more. The hole pattern found on the rectangular plate will connect to a large variety of third party cradle, gimbal brackets and mounts. The mounting base is a perfect solution for mounting to the cabin frame work on a fork lift, or any other square post up to 2 inches square.