This ball-and-socket mount allows full swivel of 360° at either the top or the bottom. They are ideal for mounting fishfinders, radar screens, speakers, multifunction displays, or any other accessory in a limited space. In addition, due to the unique double ball configuration, a broad range of possible positions is available. Simply loosen the locking ball knob to adjust or remove the unit completely. Stainless steel and powder-coated aluminum construction.