These new Clover Jumbo Wonder clips #3157 have great holding capacity for many craft projects. The Clip opens wide to hold several layers of fabric or whatever you need to keep in place. They are a great alternative to pins, especially when working with vinyl's, piles, and heavy weight fabrics. The bottom plate of the clip features seam allowance markings and slides easily on the sewing machine deck. The rounded nose allows the foot of your machine to ride along the front for neat stitching. These are a wonderful time saver. They make sewing and crafting more enjoyable while contributing to a finer finished product. You will wonder what you did without these when you use them on your next project.