Adjustable Keyless Candelabra Sockets have a thin profile to provide the illusion of candles. Use on chandeliers, lamps and sconces. Adjustable height provides flexibility when determining best proportion for lamp. Once installed, socket must be covered with candle sleeve for safety and to conceal wiring. Keyless socket requires wall or cord switch. use with candelabra light bulbs. Socket base is threaded 1/8 IP to screw onto standard 3/8" lamp pipe. Includes cardboard insulator For interior use only.