The Foba base plate is specially designed to be used with the Foba Superball ballhead series. This 9" hexagon plate is also compatible for use as a base with any other ball head, geared head, or pan/tilt head if you require a broad, low support.Weighing 2 lb, this metal hexagonal base plate can be used for field use occasionallyThe Foba Base Plate Superball Head features a 3/8"-16 threaded protruding screwWith a diameter of 9", this base plate can be effectively used as a studio accessoryWhen the tripod head and camera combination is fixed to this base plate, it remains stable without causing any unnecessary movement