Package Included: 20sets spools, light weight and durable, enough and long-life for your daily use. Large wire coil can be used to receive a bit thicker or longer wire with large capacity. Smooth Surface: about 2.7 / 6.9cm in diameter, 3.9 / 10cm high; The surface of these empty spools are well polished, will not damage your wire, easy and comfortable to use. It can make your strings or wires neat and save space for your home. Mutifunction: These empty spools is perfect when working with intricate braiding techniques to hold your thread together and prevent knotting. To wrap your thread, pop up the top to create a spool shape. Easy to Install: Just put the discs on both ends and fasten them with plastic button, Hold end of the thread against the flat part, then begin to wrap around the middle. You can even pre-string beads onto the thread and this bobbin will hold them on the strand. Wide Application: Empty thread spools can be used to hold thread, twine, bobbin, cord, wire, and many other items. Ideal for encircling of all kinds of strings, chains, wires, elastic threads, decoration chains.