★ Flat 316L key ring size : Inner diameter: 1 1/10" (28mm),outer diameter: 1.25 " (32mm). Package include : 10PCS ★ These key rings are made from the most versatile material, classified as both surgical and marine grade 316L stainless steel. ★ It is the most widely used stainless steel in the world due to its excellent corrosion resistance and durability that makes them last for years. ★ Excellent connecting accessory : The round flat split ring is good for connecting clasps, charms, links and other ornaments; Easy and convenient to carry. ★ Widely use : Suitable for a wide range of uses. In addition to holding keys, they can also be used to carry membership cards, connect fasteners, pendants, links, clasps, charms, and dog tag rings.