The Recessed Light Socket to 5/8" Baby Pin Adapter from Kupo allows you to mount a light on an overhead light socket. One end of the adapter is a non-electrically and non-heat conductive 1-1/8" threaded pin that screws into the light socket. The other end is a 5/8" pin to which a light fixture's 5/8" receiver is secured. The adapter also does double duty as a 1-1/8" to 5/8" adapter for stands with a Junior mount.
