This DMC set combines bobbins and a storage ring to keep embroidery floss organized in one grab and go bundle for travel or project bins. It includes 28 plastic bobbins plus an easy open metal ring sized at 2 1/2 in, so you can group a full palette and carry it without loose pieces. Clip bobbins on after winding, close the ring fully, and store flat so the bobbins stay aligned and the threads do not twist together.