Sometimes the only place you have to mount a light is a standard E27 socket in the ceiling. The base of the Kupo recessed light socket to 5/8" Baby pin adapter is made from a non-electrically conductive nylon E27 male thread. Above the base threads, the adapter expands to a junior sized, 1/8" Pin. The top half of the adapter is an aluminum baby 5/8" Pin. The nylon is also non heat conductive and makes a great handle to hand hold lighting fixtures.