Screw terminals are backed out. Hickeys and nipples are threaded for mounting on standard fixture, 1 A stems or brackets. 7/16 in bracket height. 1-7/8 in overall height. 660 W, 250 V. Meets all UL 496 requirements.
Set screw prevents rotation of socket
Set screw prevents rotation of socket
Two-circuit sockets operate dual filament lamps on sequence of low, medium, high, off