For strong, long-lasting binders that can hang tough with even the most demanding activities, go with this 4-pack of Avery 79638 Heavy Duty 3 Ring Binders in dark colors, including black, blue, green, and red. Each 2-inch binder features a sturdy exterior with a tear-resistant spine (DuraHinge) and more flexible, split-resistant edges (DuraEdge). Plus, the deep-weave polypropylene cover makes it resistant to tears, bubbling, and surface wrinkles. A wider front and back binder panel also ensures that standard dividers and sheet protectors are fully covered. Inside, back-mounted rings ensure pages lay flat and turn easily, while the one-touch design makes opening and closing the rings a breeze. Each 3 ringed binder features a 2.8-inch spine and 2-inch slant rings that hold up to 530 sheets of 8.5" x 11" paper, dividers, or sheet protectors. Perfect for use as report binders, recipe binders, school binders, presentation binders, photo albums, and more. For those who collect trading cards, pair these card binders with Avery's Trading Card Storage Sheets for effortless organization. No matter what you use them for, you can easily personalize your own custom binders using Avery Design & Print Online and the available cover binder templates.