Zipper is a kind of connector which can make the articles join or separate by means of the chain teeth arranged continuously. Now it is widely used in clothing, bags, tents and so on. Zipper is a fastener composed of two strips with a row of metal teeth or plastic teeth, which is used to connect the edge of the opening (such as clothes or bag mouth). A sliding piece can pull the two rows of teeth into the interlocking position to close the opening. Zipper is used to connect to something (as a suspended or dropped object) to tighten, stabilize or guide the chain of the object.

The zipper is composed of chain teeth, pull head, up and down stop (front and back) or locking parts. The chain tooth is the key part, which directly determines the side pull strength of the zipper. General zipper has two pieces of chain belt, each piece of chain belt has a row of chain teeth, two rows of chain teeth crisscross each other. The pulling head holds the chain teeth on both sides, and the chain teeth on both sides can be meshed or separated by sliding with the help of the pulling loop.

Source: @sinistertattoo