?Stainless Steel Key Rings in 5 Sizes?--- This heavy duty key rings (flat round ) assortment is made of stainless steel in 5 sizes: small 1/2 inch (15mm) X 4PCS + 3/4 inch (20mm) X 4PCS + 1 inch (25mm) X 4PCS + 1.2 inch (30mm) X 4PCS + large 1.3 inch (35mm) X 4PCS in diameter. With 5 different sizes, it can meet most of your needs in daily life. ?Waterproof. Rust Corrosion Resistant?--- Made of premium stainless steel material, these heavty duty key rings(flat round) are waterproof, rust corrosion resistant. You can use these stainless steel key rings in pool, seaside, bathroom, or rainy days. No worry about rust. ?Close Tightly. Good Spring Retention?--- Compared to the key rings made of alloy, our stianless steel key rings(flat round) has better spring rentention. It is flexible to open, and spring back to stay closed tightly. Now, you do not need to worry about your keys falling apart. :-) ? Heavy Duty, Strong, and Well-Made?--- These heavy duty key rings(Flat round) are made of premium stianless steel, strong and sturdy enough to hold 10 lbs weight. You will find These stainless steel key rings are well-made, polished and treated carefully to ensure a smooth surface and bright color. ?Wide Application in Our Daily Life ?--- With diferent sizes, these stainless steel key rings loop (flat round )are wide range of application. You can use them to organize house / car keys, hang cards, making arts or crafts. These heavy duty key rings are also suitable for connecting claps, charms, links, pedants, jewelry and ornaments, Dog Pet Collar Tag and so on.