– Great alternative to pins, especially when working with vinyls, piles, and heavy weight fabrics. – Holds layered sections of sewing projects such as, handle connectors to handbags, piping, etc. without distortion. – Holds quilt binding while sewing. – Easy to see on your work and easy to find when dropped to the floor. – Works well with sergers. (*sergers= overlock sewing machine) Seam allowance can be estimated in units of 5mm, 7mm and 10mm.