【Metal Key Rings Assorted in 5 Sizes】--- This flat key rings assorted is made of premium alloy in 5 sizes: 1/2 inch (15mm) X 4PCS + 3/4 inch (20mm) X 4PCS + 1 inch (25mm) X 4PCS + 1.2 inch (30mm) X 4PCS + 1.3 inch (35mm) X 4PCS in diameter. With 5 different sizes, it can meet most of your needs in daily life. Convenient and save your money ! | 【 Well-Made Metal Key Rings. Strong and Sturdy】--- These sliver round key rings are made of premium strong alloy, strong and sturdy enough to hold 1.5 lbs weight ealiy. These metal key ring are also polished and treated carefully to ensure a smooth surface and bright color. Of course, It is anti-rust and do not rust easily. | 【Round Key Ring with Good Spring Retention】--- Made of premium strong alloy, these metal fald round key ring has a 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. :-) | 【Special Small Key Rings for Dog Pet Collar Tag 】--- According to the opinions from our customers, they want the metal key rings for dog or pet collar tag, while the key ring they got is always bigger, after testing different sizes, we found small 1/2 inch (15mm) key ring is more suitable. With a suitable key ring for pet collar tags, they will be more confortable ! | 【Wide Application in Our Daily Life 】--- With diferent sizes, these round flat metal key rings are really application. You can use them to organize house / car keys, hang cards, making arts or crafts. Also, these flat metal key rings are suitable for connecting claps, charms, links, pedants, jewelry and ornaments. You will find it is really helpful !