These lamp sockets usually work with E26 or E27 bulbs. Widely used on hanging lights, wall lamps, table lamps, floor lamps. Great for places like home, restaurant, hotel, cafe.Max Power: 250W; Max Voltage: 250VAC; Pull Chain Length: 150mm / 5.91"; Lamp Socket Size: 33mmx70mm / 1.3x2.76"(D*H); Thread Size: 1/8 IPIt is made of an aluminum shell and metal conductor, with good rust and heat resistance. A pull chain switch included here will help you control the light easier.Remove the bottom socket base and shell, then screw your copper wire into the socket base with a screwdriver. Then put the shell on and fixed it on the socket base. Finally, screw the bulb in.Please note that the pull chain switch is a 2-way ON/OFF switch.Products from Bazhou's store