Package Content: It includes 150pcs key chains and 150pcs open jump rings, separate packaging. The key chain design is easy to install to make your DIY project easy. Size: Ring diameter About 1 inch/25mm, total length about 2.1 inch/54mm; With these high quality metal parts, you can create your own key chains to give as gifts, sell or promote your business or organization. Durable Material: Made of high quality silver-toned nickel metal, strong and durable, simple. Good workmanship with the ring, smooth surface and edge, will not scratch your hands and stuff. Suitable for DIY: You don't need to buy additional parts. You can use your imagination to make your own key chain, make for phone, bag, wallet and other accessories. Easy to use: Each key chain comes with a separate jump ring, you can easily attach pendant, tags and other small accessories. You don't need to put extra effort to open before connecting anything on it.