KINGSO 4 Pack E26/ E27 Solid Brass Industrial Light Socket Vintage Edison Pendant lamp copper holder With Knob (Copper) 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 These lamp holders are ideal for bare bulb features with E26/E27 Edison Screw Bulbs With hard paper in the socket inner, seismic and impact resistance