ZITRADES(TM) 10PCS/Lot E27 male to E27 female Bulb Holder Silver Tone White Adapter Extender only for LED Bulb E27 to E27 Bulb Lamp Extend Base Socket Adapter White Color Just plug the blub and bulb holder; Suitable for all volage 100% Satisfaction Guaranteed Purchase with confidence Attention : ZITRADES socket not fit for halogen bulb only for LED Bulb !