Cardinal Easyopen workplace locking slant-d ring binder EasyOpen® Workplace® Locking Slant-D® Ring Binder, 3" Capacity, Black EasyOpen® locking Slant-D® ring mechanism instantly engages when closed, eliminating two-step and two-hand operation. No scratched desks or bookshelves from triggers that don`t close up. Opens and closes with just the touch of one finger which earned this binder the "Ease-Of-Use" Commendation from the Arthritis Foundation. Safer and easier to use than other metal ring binders--no more pinched fingers. Holds 25% more than conventional round ring binders. Nylon reinforced hinges are guaranteed for life.