Insertable D-Ring binder provides up to 25 percent more capacity than same-size round-ring binders. Clear, polypropylene overlays on front, back and spine let you customize your presentations. D-rings are mounted on the back cover to let pages lie flat to reduce wear on paper. 4" capacity holds up to 800 sheets. Heavy-duty recycled chipboard core is designed for heavy use. Binder also offers exposed rivets and two clear inside pockets for loose documents.