These ball and socket mounts will not come down or drop like other brands and allow full swivel of 360? at either the top or the bottom. Ideal for mounting even the heaviest fish finders, radar screens, speakers, multi-function displays, or any other accessory in a limited space or that needs to be raised. A broad range of possible positions is available. Simply loosen the locking ball knob to adjust or remove the unit completely. Stainless steel and hard coat anodized aluminum construction. Can be modified to mount GoPro^® cameras. Size 17" Color Stainless/Black