Bobbini is a bobbin holder that fits on top of thread spool on one end and it carries a bobbin on the other.'<br> Due to its flexibility, Bobbinis works on most home sewing, quilting and embroidery threads spools<br> And it works with the most common bobbin types L,A,M. Winding thread twice over post before snapping bobbin will prevent unwinding.<br> These functional pieces will help you organize those loose bobbins. Comes in a package of 48 colorful pieces.<br> Easy to use and they make a great gift as well.