If you use Copin's style or system of thread work, this gimmick is a great thing to have in case the thread breaks, and it will :), its a ingenious gimmick that allows you to get back into your hook up, under the spectators nose, yes literally in front of them without them knowing. Its great that it comes with a sample (about 3 feet) of Copins thread, for you to try out with your gimmick, and because its not stripped, you can literally make 30 thread hookups to use with the ITS, even though only one fits at a time. i got two ITS's just in case :)