One Touch EZD locking rings open with ease and keep pages secure. Gap Free ring feature prevents gapping and misalignment of rings. Wider front and back panels fully cover standard dividers and sheet protectors. Pages lie flat with back mounted rings. EZD rings hold up to 50% more than same size round rings. Exposed rivets on back. Binder is heavy-duty PVC-free poly. Holds 8-1/2 x 11 Inches documents. 5Inch has thumb notch on spine. 45% post-consumer content.