Extra firm locking mechanism prevents spills and eliminates gaps. Easy-to-grasp, oversized trigger. Slant-DÂ® rings hold 50% more than standard round rings. Patented Expand-A-PocketÂ® holds an additional 1/2" stack of paper. DataGuardâ„¢ inside pocket protects documents from ring impressions. Stands up to years of use. Heavyweight vinyl cover provides a professional look and feel.