These spring clips typically sit beneath the lampholder and enables the attachment of a glass fitting to the chandelier / light fitting.
The two spring arms flex outward when inserted into a hole or recess, such as the opening of a glass globe, then snap back to grip the surrounding material.
The 10mm centre hole allows a cable, threaded rod, or fixing screw to pass through—commonly used for mounting a lampholder or cord grip.
It provides a secure, tool‑free hold while still allowing easy removal for maintenance or rewiring.