The only thing better than Wonder Clips - is LOTS of Wonder Clips! The 50 pack offers plenty of clips for any size project! Wonder Clips have a wide opening for holding multiple layers of fabric. They won’t damage or distort your fabric, and you won't have to worry about accidentally sewing over pins! The. Wonder Clip base is flat for easy feeding to presser foot with 1/4″ and 1/2″ seam allowance markings on the base.