ClearVue Locking Round-ring Binder features antimicrobial properties built-in to protect the product. Clear, nonglare, nonstick overlays on front, back and spine allow easy insertion of custom title sheets or graphics. Free templates are available online to customize title pages. Locking round rings mounted on the spine hold letter-size contents securely. 1-1/2" ring capacity holds approximately 375 sheets. Horizontal pockets on the interior front and back covers offer additional storage. Each pocket holds 40 sheets. View binder also offers polypropylene construction, exposed rivets and a sturdy chipboard core.