* Package includes 10 pieces of loose-leaf binder rings in silver color. Mr. Pen loose-leaf binder rings are made of iron and are strong and durable. * Mr. Pen loose-leaf binder rings are made of iron and are strong and durable. The multi-layered nickel-plated steel prevents rusting and color fading. * These rings are ideal for fastening all sorts of items together. They lock securely, and they open and close with ease. * Mr. Pen loose-leaf binder rings are packed in a plastic box, which is compact, portable, and easy to store and organize. * Use these convenient rings to bind documents or link together many different materials. Great for loose-leaf, memo filing, key rings, scrapbooks, binding recipes, photos, sample books, contracts, or files.