This lot of 12 overlock sewing threads by Coats SureLock offers a variety of colors suitable for various sewing projects. The threads are made of polyester and suitable for use with sewing machines and overlock/serger machines. With a mix of general sewing, quilting, embroidery, and heavy-duty applications, this product is ideal for a range of crafting needs. These threads from trusted brands like SureLock provide quality and reliability for your sewing projects.