1. Friendly reminder: The zippers fit standard size zippers, so they may not be compatible with your specific zips. 2. Durable and practical: Easy to use: Step 1: Clean the zipper. It works when lubricated. Step 2: Open the zipper. It requires some strength to open. Step 3: Snap the zipper into place. Step 4: Hold the zipper firmly and slide the slider up and down a few times to ensure smooth operation. Step 5: Now you can use the slider handle to close the zipper. 3. Modern design; Color: As shown in the picture. Universal sizes. Helps with the most common zipper issues, including broken zipper guides, damaged sliders, and up to 3 missing teeth. Suitable for jeans, skirts, golf bags, sleeping bags, handbags, jackets, suitcases, and tents. Can be installed in the middle of a zipper and works in both forward and backward directions. Easy to install—no tools required. 4. SAFE MATERIALS: Made of nylon plastic and stainless steel. from BPA and other harmful or toxic chemicals.