1, WHAT YOU GET --- We have prepared 25mm Key rings for you, key rings with chain, you will get 150 pieces open jump rings and 150 pieces screw eye pins. Totally 450 pieces keychain findings that will meet your needs for craft projects. 2, SIZE DETAILS The split ring size, approx. 1''(25mm) in diameter with 1 extension chain, the open jump ring is 3/8 (8mm) in diameter and the screw eye pin is 10mm x 5mm in length and width. Great for making keychain accessories 3, CONVENIENT 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 and screw eye pins that make it a complete set of accessories, so you do not need to buy additional parts. 4, SUITABLE FOR DIY -- You can DIY your own keychain with this metal key ring.Suitable for making some small project, arts and crafts, or gifts making.Great key chain making accessories.