Here we have a set of four Shade reducer rings. These are used to reduce a 40mm (larger hole) to a standard British 28mm size hole on Lampshade, etc.
For a hanging shade you will require two rings, one either side of the large hole to pinch the metal of the lampshade.
This set has four , enough to do two lampshades. These are made of metal so offer a durability that the plastic ones don't
