Seven Knob candles are used to make wishes come true.Carve a wish on each of the seven knobs, and anoint each knob with oil. Burn one knob every day for seven days. You may burn a knob for each wish, or a knob a day. Carve a brief word or symbol associated with your wish into each knob. Anoint the candle with the oil associated with your wish and burn your candle. These candles come in red, black, green, and white.