With locking key designs, these large binder rings ensure that your files or keys stay in place and don't get misplaced. Each ring has a 3.5-inch inner diameter, providing ample space to hold multiple sheets of paper or larger keys. This pack includes 10 pieces of silver-tone book rings, offering you plenty of options for organizing your files, papers, notebooks, or keys.Features:Made of tough metal, durable, will not crack, split or bend.Design with clamp on closure, easy structure and convenient to use.Used for loose-leaf book, memo filing, key rings, scrapbook, sample holder or other loose-leaf items.Specifications:Product Name: Loose Leaf RingsMaterial: MetalColor: Silver ToneNet Weight: 370g/13ozThickness: 4mm/0.16Inside Diameter: 90mm/3.5Outside Diameter: 97mm/3.8Overall Size: 97 x 90 x 4mm/3.8 x 3.5 x 0.16(OD*Inner Dia.*T)Package Content: 10 x Loose Leaf 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.