Leaf binder rings for book, 50 PCS per pack, 0.8 inch / 20 mm diameter (outer ring).Nickel plated surface, durable, color unfading, rust proof.Used for binding recipe, photos, book, sample book, scrapbook, contract or file.Tight lock-in design, secure, easy to operate.Metal material, could hold heavy stuffs, could serve as key ringProduktbeschreibung Binder rings assorted sizes. These Binder rings open to hold punched material. Multiple usages for binding keys, recipe book, photos, sample book, scrape book, contract, file or other loose-leaf items. Vary from 0.8 to 1.5 inch diameter. Metal material, nickel plated, rust proof, color unfading. Large binding capacity. For instance, 1 ring maximum binding capacity is 150 sheets copy paper.