Slant-D ring binder features no-pinch rings that open, close and lock with one touch. Binder is so easy to open that it received the Arthritis Foundation's "Ease-of-Use" Commendation. EasyOpen Slant-D ring design holds 25 percent more sheets than standard round-ring binders. Locking steel rings are mounted on the back instead of the spine so pages lie flat. 1-1/2" ring capacity holds approximately 325 sheets. Horizontal pockets inside front and back covers are designed for loose, unpunched documents. Each pocket holds 30 sheets. With polypropylene, contents will not stick to the binder cover. Binder also features exposed rivets and a sturdy chipboard core.