DuraHinge design that's stronger, lasts longer and resists tearing Durable construction is ideal for frequent reference DuraEdge makes the sides and top more pliable to resist splitting EZD rings hold more paper than same-size round rings Deep-texture film offers a smoother finish for high-quality look and feel Pages turn smoothly across rings Wide binder panels fully cover standard dividers and sheet protectors Back-mounted rings let page lie flat Nonstick material won't lift ink or toner off printed pages Organize and secure paper with 4 interior pockets