Push in Bayonet bulb Holder to ES screw fitting. Convert Lamp bought in UK, India, Australia etc to USA Edison Screw type Light fitting Convert a Push in Bayonet Lamp holder to an Edison screw holder Ideal if you have a lamp, Light that was purchased in the UK or other country using Bayonet lamp holders Simply changes the lamp holder to allow for the screw bulb to be fitted Does not change the voltage