Broad compatibility: universal zipper slider replacements in multiple sizes and shapes, suitable for repairing luggage, outdoor gear, wallets, and backpack zippers. Auto-locking design: the additional automatic locking slider 5 (nylon spiral-tooth slider, metal zipper slider, plastic zipper slider) locks automatically to prevent slipping, ensuring smooth operation. suitable for outdoor clothing and jackets. High quality materials: made from high-strength metal with an excellent galvanizing process for durability and reduced risk of wear or loss. Safe storage and portability: compact and organized for easy storage at home or in the office and portable for camping or on the go. easy to select the right size. Use scenarios: - travel: quickly replace a worn or stuck zipper on luggage - outdoor: repair zippers on jackets, tents, or other outdoor gear - everyday: replace zippers on wallets and backpacks for reliable use