Brass Two Circuit Rotary Switch is a 3-way design providing off/on/on/on positions. Use on Reflector Floor lamps with 3 candle light arms. The two circuit switch operates the candle socket, the mogul socket is turned on and off with its own turn knob switch.
Before making any changes to electrical fixtures and/or lamps:
Disconnect plug/wire from the electrical source.
Turning lamp off will not protect you from electric shock.
If you are unsure how to safely proceed contact a licensed electrician.