Does what it says in the name! Keeps bobbins wound and tangle free. Flexible and easy to use, holds up to 30 bobbins.
Look, it isn't an exciting colour, it isn't fancy, it doesn't make noise of glow in the dark. But I've been using one just like this for almost 20 years and it does a great job of keeping my bobbins secure and tidy. It may be the only thing in my sewing room that is secure and tidy, including myself.