Cardinal by TOPS Products SuperStrength Locking Slant-D Ring Reference Binder, 2 Inch Capacity, Navy (11547) Extra-firm locking mechanism to prevent spills and eliminate all gaps Easy-to-grasp oversize trigger Slant-D rings hold 50% more than standard round rings Patented Expand-A-Pocket in back holds an additional 1/2" stack of paper Heavy-duty reference style covers contain minimum 45% recycled content (by weight)