Leviton 4155-51 Incandescent Lampholder, Bottom Turn Knob Switch, Candle, Medium Base, 660W-250V, 2 Leg Steel Bracket Assembly Pinned to Socket Incandescent lampholder Bottom turn knob switch Medium base, 660W-250V 2 leg steel bracket assembly pinned to socket 2 43/64 inches overall height, 3/8-27 by 13/32 inch long round bushing.