1.【Premium Quality】: This product allows you to repair any zipper in no time.It is of premium quality and very durable. 2.【Multipurpose】: It works on most broken zippers, including cracked or broken zippers or zippers with missing teeth (up to 3 missing teeth). 3.【Easy Installation】: Installation is very simple and requires no tools.It is removable and reusable and can be used in the middle of a zipper to slide back and forth. 4.【Package Contents】: The set contains 6 pieces in 3 sizes: 2 pieces in size S, 2 in size M and 2 in size L. It is suitable for various items such as tents, suitcases, clothes, jackets, sleeping bags and golf bags. 5.【Easy to use】: You just need to loosen the screw to release the zipper.Insert the unit into the teeth of the zipper and then slide to open/close.