QUANTITY:key rings with chain bulk comes with 50 pieces metal keychain rings with chain and 50 pieces open jump rings. Totally 100 pieces keychain findings that will meet your needs for craft projectsDURABLE MATERIAL:The round keyrings are made of hard iron metal that are strong and sturdy for use. And silver-toned nickel plating makes them shiny and smooth on the surface and edgeCONVENIENT FOR USE :The key rings bulk with chain and connectors are convenient for you to attach charms, pendant or other accessories on. The set also comes with extra open jump rings that make it a complete set of accessories, so you do not need to buy additional partsPERFECT FOR DIY CRAFT PROJECTS:The key chain rings come with extra open jump rings that are ideal for making home car keychains, lanyards, gifts and other art and crafts workSIZE DETAILS:The split ring is approx. 1 (25mm) in diameter with 1 extension chain, the open jump ring is 3/8 (8mm) in diameter. Great keychain making supplies for making keychain accessories