The candle has a clamp that is used to extinguish the candle. The clamp does not always sever the wax close to the wick and extinguish the candle as intended. This can allow the flame to continue down into the coiled section of the candle and ignite the entire candle.
The candle has a clamp (vise) that leads the end of the rope candle at the top. When clamped properly it is supposed to self-extinguish the candle when the burning wick meets the metal clamp (vise). The clamp (vise) does not always sever the wax close to the wick and does not always enable the wick to self-extinguish. This can lead to the flame continuing down into the coiled section of the candle, which can then ignite and cause fire damage.