Bead stopper (When you don’t Use a bead stopper, You may use a binder clip of a little bit of tape.) I really favor Chinese knotting twine for sliding closures. However, if you don't want to bother acquiring it, you can use the silk thread - preferably a sizing up. https://brookscdaxu.blazingblog.com/30683349/the-best-side-of-bracelet-tutorial