Zippers are everywhere in our daily lives. YKK zipper is far superior to other zipper brands and will outlast non name brand zippers 10 to 1. Our YKK coil zipper is made of a continuous piece of extruded nylon thread that has been formed into chain making it stronger and more flexible for going around corners than a zipper with teeth. Buying zipper by the yard is the economical, easy way to buy and you always have the right size of zipper for your project. Zipper chain is easy to use. It can be cut with regular scissors and the sliders can be easily attached by feeding the chain one side at a time, into the front of the zipper at a 45° angle lining up the ends. No need for zipper stops since you can sew right over the zipper.