Chrome 2 1/4" Gallery with 28mm hole 4182650
This gallery has a 28mm hole in the center which you can simply add a BC lampholder to it clamping the lampholder in place with its shade rings.
Has 9 Decorative holes in the top for heat ventilation.
And has 3 screws to hold the shade in place, these can be done up with a slotted screw driver if needed.
Center hole size: 28mm
Shade Hole Diameter: 2 1/4" (57.15mm)
Material: Brass, Chrome plated