Basic D-Ring Binder holds 25 percent more capacity than standard-size, round-ring binders to maximize your storage space. D-ring mechanism includes opening and closing triggers for easy access. Metal rings are mounted on the back so the binder will last longer and pages will lie flat. Durable vinyl covers protect letter-size documents secured by the rings and loose papers in two opaque, interior pockets. Front cover folds back to create a convenient writing surface. Binder also features a sturdy chipboard core and exposed rivets.