Place jar candle on warmer (wickless or wicked) and the heat from the plate will melt the candle and give off the fragrance. Candle warmers are great when you want to "burn" a candle in place where open flames are not permitted. Great for offices, dorm room, babies rooms, ect. Candle warmer will fit jar candles up to 3 1/4" wide. Fits our jars perfectly!