Candle Wick sustainers are small metal tabs that help hold the wicks in place during candle making. They also keep the wicks straight while candles burn
First, cut a length of candle wick to the desired size for your candle. Taking note of the burning direction of the wick insert the top end through the hole in the wick sustainer tab and pull through.
Use pliers or other crimping tools to squeeze the wick sustainer tab, holding the wick securely.