Pack Of 5 E26 E27, Edison Screw to GU10 Bayonet Base Lamp Socket Adapter Convert your existing E26 Base (US standard light bulb socket) into a GU10 base High temperature resistant,anti-burning PBT and anti-aging Suitable for all voltage and Halogen/LED/CFL lights White porcelain shell material, aluminum screw Easy to use, just screw in to existing socket