11" Articulating ArmThe ProMaster 11" articulating arm is a great way of mounting a variety of accessories to your camera rig or tripod (with compatible connection port) at almost any angle. Use it for an LCD monitor, microphone or sound equipment, small light, phone or tablet (with corresponding clamp), and more. The arm features 1 4" 20 male screws and ball heads at each end. There is also a pivot joint in the middle that uses two facing rosettes for a secure friction