Zippers are metal accessories attached to dresses, shoes, and bags, used as closures..Based on the application they are broadly categorized into Visible and Invisible Zippers.Zippers use two sets of interlocking teeth called chain zippers, or coils called coil zippers, each connected to a strip of fabric tape. The teeth or coils are formed of metal,plastic, or synthetic material. A slider with a tab, which may be purely functional or serve a decorative function as well, is used to open and close the zipper. Besides the details of the mechanism, there are several other ways of categorizing zippers. Like categorization based on element or teeth material. Types of Zippers There are 3 main categories of zippers which are based on 3 different types of materials as below: Metal Zippers zipper-metalMetal zipper is most basic original zipper first produced.When slider slides up in a zipper the elements get tightly interlocked to keep zipper shut.Metal zippers are divided into grou...