This binder slant D-rings allow for 25 percent more storage than regular round rings for storage of up to 500 pages. Two interior pockets inside the front and back covers provide added space to seep stary papers in place. The EasyOpen latch is easy to open and close the rings--just one finger does it. No more pinched fingers! Locks when closed. This product has been recognized for ease of use by the Arthritis Foundation.