6 Size Jump RingsThe diameters of split rings are 4/5/6/8/10/12mm, common size, with this size one can finish most jewelry or crafts work. It can also meet most of your needs in daily life. Convenient and save your money Premium MaterialDouble loop rings are made of iron, and there is a layer of electroplated shiny gold/silver plating on the surface, which is not easy to fade and has excellent performance, hard and durable.Good Spring RetentionThese metal round key rings have great spring retention. It is convenient to open the ring, and spring back to close tightly. Now, you do not need to worry about your keys falling apart.Easy to StorageAll the round metal split rings are packed in a divided transparent box, which is easy to store and avoid losing. It is easy to carry and can be handmade at any time.Wide ApplicationThe split rings are perfect for home, car, office keys organization, DIY accessories, keychains connector to connect USB, hang cards, other ornaments, arts crafts and making.