Safe materials: this zipper is made of nylon plastic, stainless steel. BPA free and no other harmful or toxic chemicals, washable and will last for many years. Durable and practical: easy to use. Step 1: Clean the zipper. It is recommended to lubricate it. Step 2:Open the zipper You need to force a little to open it. Step 3: Attach the zipper. Step 4: Hold the zipper tightly and slide it up and down several times to make it smooth. Step 5: We can now use the zipper to close it. Modern design: Colour: as shown in the picture. Universal sizes. Works on most broken zips including split or broken zips or missing teeth fasteners (up to 3 missing teeth). Widely used: the zipper pullers are suitable for jeans, skirts, golf bags, sleeping bags, wallets, jackets, suitcases, tents, etc. can be used in the middle of a zipper and can be pushed forward and backwards. Easy installation. No tools required. Note: Our zippers are only suitable for standard zips.