Slant-D ring binder features no-pinch rings that open, close & lock with one touch. 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 & 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 & a sturdy chipboard core.