This bobbin cilps can be spliced, keep bobbin and thread matched up. Suitable for most thread spools and bobbins, including Types A, L,M. Just slip one to get on a bobbin holder and hold it tight into the notch of bobbin and make sure your thread caught in the middle. The fantastic clips will tighten the bobbin and won't let it twine even if you drop it. Easy to use! Simple but super functional thread holders will add organization and fun to your sewing room. This cute, useful, and high-quality product improve your organization of sewing supplies. They are durable to last for years and fit most domestic embroidery and sewing thread spools. Specification: Material: Plastic Color: Multicolor Bobbin Clamps Size: 2cm/0.79inch Bobbin Buddies: 6.8cm/2.68inch Package Includes: 25 Pieces Bobbin Clamps 25 Pieces Bobbin Buddies Note: Please allow slightly difference due to manua l measurement. Color may be slightly different since different monitor. Thanks!