These E27 screw type lampholders have wider shade rings for delicate lampshades or those with larger than standard holes. The wide ring will fit holes up to 58mm wide.
M10 Threaded Entry, cord grips available separately if needed
These lampholders also look great with bare bulbs and without shade rings.
For Edison Screw bulbs known as ES or E27
These fittings require an earth connection & three core flex
