Great holding capacity for many crafts with a wide opening, guide scale and flat back. 50pcs per package. Features: Clip opens wide to hold layers of fabrics . Clip base is flat for easy feeding to the presser foot. Seam allowance markings of 1/4 in (7mm) and 1/2 in(12 mm) 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. Works well with sergers.