Heavy-duty binder features One Touch EZD rings that open with ease and keep pages secure. Gap-Free ring feature prevents gapping and misalignment of rings. Wide front and back binder panels fully cover standard dividers and sheet protectors. Pages lie flat with back-mounted rings. EZD rings hold up to 50 percent more than same-size round rings. Binder has exposed rivets on back and holds 8-1/2" x 11" documents. Four durable interior pockets to store handouts and loose or unpunched pages. Cover material is PVC-free polypropylene. Binder is also made with chipboard.