Features no-pinch rings that open, close and lock with one touch. D-ring design holds more sheets than standard round-ring. Locking steel rings are mounted to the back instead of the spine so pages lie flat. 4" ring capacity holds approximately 775 sheets. Clear, nonglare overlay holds custom title sheets. Acid-free polypropylene construction prevents contents from sticking to the cover. Four horizontal pockets are stacked inside front and back covers to maximize storage space on the covers. Each pocket holds 30 sheets. Exposed rivets and a sturdy chipboard core.