These hard to find nylon coil zippers are perfect for bags and carriers. The wide zipper tape makes insertion easy. Unlike zippers with chunky molded polyester teeth these handbag zippers are soft and flexible making them easy to sew through. (No more broken needles!). The nylon coil is strong and durable zip after zip. The double slide lets you open your bag from either end. The double slide also enables you to make two single slide zippers. For example if you only need an 18in single slide zipper for your project you will still have a 12in single slide zipper left for another project.