Continental ES 10mm Lampholder [Threaded Skirt with Shoulder]
ES / E27
10mm Threaded Entry
Shade Compatible (Lock Ring Not Included)
Width: 40mm (+shoulder), Height: 55mm
These lampholders are easy to use and hold shades well. Can be used as a replacement lampholder in many cases. Mounts on a standard 10mm allthread. Fits a 40mm shade hole. Only needs 1 shade ring to go with it, as it already has the shoulder to support the shade.
If in doubt consult an electrician