Loose leaf binder rings are small metal rings designed for various uses. With a 1-inch inner diameter, these binder rings are perfect for organizing loose leaf papers, documents, and other materials. They can also be used as key rings, providing a convenient way to keep your keys organized. Made from durable metal, these binder rings ensure long-lasting use.Features:Closed tight, not scattered after collapse, a good organizer.Design with clamp on closure, easy structure and convenient to use.Wide range of uses such as loose-leaf, memo filing, key rings and sample holders.Specifications:Product Name: Book RingsMaterial: MetalColor: Silver ToneNet Weight: 139g/4.9ozThickness: 2.8mm/0.11Inside Diameter: 25mm/1Outside Diameter: 30mm/1.2Package Content: 50(+/-2%) x Book RingsNotes:1.Colors in the screen may not accurately reflect the true color due to individual computer monitors differences.2.Due to the different measure ways or tools, there may exist slight deviation (ranged at 1-3cm), hope you don't mind.