Designed for use in new fixtures or as a replacement for worn-out sockets, this Precision Lighting 80-1059 on/off, turn-knob light socket has an easy-to-operate traditional style. With its nickel finished removable turn knob, it can be replaced or extended to make a subtle yet impressive change to the appearance of the socket. Threaded to fit 1/8 IPS pipe, this 4-piece socket set is equipped with a solid brass shell, cap, ring, and cardboard interior. So, whether you're building or repairing lamps, this nickel finished, on/off socket set will provide practical lighting with the option to alter the appearance! Screw set included for easy mounting.