Durable Design: This heavy duty binder features a durahinge design that resists tearing. The 4 inch binders 3 ring provides durability, working great as a school or office binder Flexibility: The 3 ring binder 4 inch EZD ring size with duraedge offers flexibility, by avoiding splitting during heavy use. This three ring binder is ideal for school binder needs High-Quality Finish: Our black binder 1.5 inches EZD ring features a deep texture film for a linen pattern, offering a sophisticated finish Storage: This binder 3 ring holds up to 780 sheets. It's a large binder with ample storage for all your documents and sheet protectors Full Coverage: The wide panels of this binders 4 inch black binder protect standard dividers and sheet protectors