Blue Feather Products, inventor of the magnetic pincushion in 1980, is proud to bring you an innovative devise that joins bobbins with their spools of the same thread color. This BobbinLink connector will join the bobbin to any size spool or cone. The connecting of spools and bobbins enables compact thread storage in any protective containers. In a container, it is easy to see your thread pair colors and secure the color you need. The included Ringlet plastic bands expand to encircle the thread on the bobbin to keep it from unwinding. Good thread is expensive and the threads are made from long staple cotton, polyester, nylon, as well as silk, all of which can degrade with time, sunlight, moisture, and dust. Have you ever noticed that old thread will knot easily when hand sewing or break on the machine? So, rather than racks which take space and put thread out in the open, or drawers with everything loose and tangled willy nilly, let BobbinLink keep your thread, matched, and healthy.