The upper and lower stop function of the zipper is a standard designed to prevent the pull head from falling off. There are many zippers used in clothing. There are two types of zippers: top stop and bottom stop. So what is the purpose of this zipper's top stop for us?

The structure of the zipper: The front end (with lace on the upper end) is also known as the top end, pull end, chain tooth (also known as the zipper tooth), fabric belt, and back end fabric (with lace on the lower end) are also known as the bottom end. The top and bottom ends are divided into iron (aluminum wire) and injection molding. The closed zipper is called the top and bottom end, while the open zipper is called the top and bottom end, and the bottom end is also called the left and right pins.