@sunsuniyo thanks! I took a metal keyring and then covered it with thread (like when you're doing a loop, just instead of looping onto other strings you're looping onto the bracelet) and cut the excess string. Then I attached on both sides all the threads, couple by couple, with a lark's head knot. It's a bit tricky to actually start knotting because the strings aren't in the same order you can attach them