The shuttlecock is a wound of thread, and is an indispensable tool for hand looms. This product is a special shuttle made by Clover bracelet manufacturer (model number: 57-656) sold separately.
The bracelet is made by stringing a strand onto the body and tying it with another string.
You can make not only embroidery threads, but also lace and sewing threads, so you can create a bracelet to suit your taste.