Business Source - BSN33127 Binder features slanted D-rings to hold more sheets and allow lay-flat visibility. Transparent label holder on the spine lets you quickly find the binder you need. Interior pockets conveniently keep your loose files and papers easily accessible. 1-1/2" back-mounted rings hold up to 375 sheets of paper. Binder is perfect for large projects, training manuals, reports, presentations and more.