Features: 1. Made of Zinc Alloy, with spring loaded, can be smoothly opened or closed by holding the small lever. 2. Equipped with a full 360 degree capable swivel to prevent tangles. 3. The 8.5mm inner diameter round ring is suitable for most jump rings and chains. 4. Silver appearance, elegant and great for making keychains, lanyards, zipper pulls, charms, purse straps, ID holders and some DIY crafts.