Business Source 1-Inch Heavy Duty Slanted D-Ring Binder - Red (33108) Locking rings are mounted on the back cover for lay-flat visibility and long-lasting durability No-gap D-Rings stay tightly closed without gaps and hold 25 to 40 percent more paper than the same size round rings 1" capacity holds up to 240 sheets Non-glare CleanView cover and pocket material resist toner transfer so ink from printed papers won't stick or mark binder, leaving a clean impression over time Label holder on spine allows easy identification