Archival-safe, round-ring binder features a lightweight paperboard core that is covered with polypropylene to conveniently display your cover page. Nonstick covers are specially designed to keep ink from lifting off the pages. Heavy-duty, three-ring locking mechanism holds up to 475 sheets of paper. Open-and-close triggers allow you to easily add & remove sheets in a snap. Thumbholds on the spine & cover offer a quick way to load & unload any inserts. Two inside pockets offer additional storage & a die-cut slot for keeping your business cards.