This thread burner replacement tip works with the Perfect End thread burner. If you find the tip of your thread burner is worn out, simply replace it with this tip and make your thread burner as good as new. It's a great way to finish off threads and cords, as it cuts and cauterizes. It melts synthetic threads so that they don't unravel. Use it to stop frayed ends of thread on embellishments, peyote stitch, or anywhere raw ends need to be eliminated.