BC Old English Switched Safer Lampholder 10mm Entry 
The Old English lampholder with a 10mm thread in the base to allow it to be fitted to a 10 male thread. The push bar will turn to the off position as soon as the lamp is removed so turning the power to the lampholder off. This BC Safety Lampholder is ideal for children's bedrooms or the elderly with this safety device.
Comes complete with a shade ring and will fit a shade with a 28-29mm hole.
Please note - Do not try to force the push bar without a lamp fitted, it will not slide.
As this is a metal lampholder, ensure you use a 3 core mains flex to provide an earth connection to this lampholder.