Do you feel it is test of patience to put sliders on a zipper chain? Is it tedious to look for zippers in the right length for your sewing projects? This continuous zipper by the roll is the answer. No more worrying about zipper sliders that get easily stuck. No more painfully putting on zipper pulls. This zipper spool with preinstalled sliders can make 16 zippers in various desired lengths. The chain zipper with robust nylon coil and sturdy metal zipper pulls pairs well with a variety of materials such as cotton, leather, or canvas and can be used indoor and outdoor. Fantastic for making long zippers and zipping around curves, this spool of upholstery zippers by the yard comes in handy for projects such as sewing canvas drop cloth, pillows, slip covers, furniture covers, sofa-cushion covers, bench seat cushion covers, bean bag covers, or even duvet covers.