Lamp Socket Swivels provide angle-adjustment between socket and lamp. Use on floor and table lamps where maneuverability of socket is required. Socket swivels are most often used on lamps where shade hangs down. Shade and socket can be maneuvered, enabling light to be specifically directed. Ball type swivel rotates on ball. Socket swivel has female threads at one end, male thread at other end. It screws between socket cap and 3/8", 1/8 IP lamp pipe.