KINGSO E26/E27 Solid Brass Industrial Light Socket Vintage Edison Pendant lamp copper holder With Pull Chain(Gold) Update to 4 pack from Jan. 25th 2018. This is electrifier medium base copper shell lamp holder For wire and E26/E27 screw light bulbs and lamps connected, power lighting, display fixtures Very Great for quality; Saves electricity-extends bulb life The Lamp Socket with Pull Chain can be used for lamp or fixture replacement. Pull chain for on/off With hard paper in the socket inner, seismic and impact resistance