[Metal Key Rings Assorted in 4 Sizes] This Round key rings assorted is made of premium Iron in 4 sizes: 3/4 inch (20mm) X 10PCS + 1 inch (25mm) X 10PCS + 1.2 inch (30mm) X 10PCS + 1.37 inch (35mm) X 10PCS in outter diameter. Round split style design,Color: Golden, Total 40pcs. It can meet most of your needs in daily life. Convenient and save your money ! [Durable material] key-chain rings with electroplated surface, polished, anti-rust and anti-erosion, not easy to fade, these key-chain rings are made of iron material, hard and strong. [Safe & use] 2 layers of small metal split ring, stay securely closed so that the attachments won't slip off from the rings, and allow items to be conveniently added or removed. Easy and convenient to carry. [Key Ring with Good Spring Retention]--- Made of premium strong metal, these metal round key ring has a great spring retention. It is convenient to open the ring, and spring back to close tightly. You do not need to worry about your keys falling apart. [Wide Application in Our Daily Life] Metal key rings fit for various aspects and can be applied to many different items. You can use them to organize car keys, house keys, office keys, hang cards, fobs, dog’s tags, hang cards, making arts or crafts. Also, these round metal key rings are suitable for connecting claps, charms, links, jewelry and ornaments. You will find it is really helpful! Key rings are very strong and durable for organize car keys, house keys, office keys, fobs, dog’s tags, hang cards, making arts or crafts keys attachment. It is a very widely used small product in our daily life.