Contour Cover Reference Binder features a curved-back spine for a more comfortable grip. Unique construction of the cover easily houses oversized indexes and sheet protectors. Soft Click D-rings open with one easy motion, increasing productivity and comfort. One-touch rings are mounted on the back cover to reduce wear and let pages lie flat. Front inside pocket offers extra storage for loose documents. Stronger hinge for constant use is created with a special ribbed seal. Premium vinyl sealed over heavy-duty chipboard helps deliver the highest quality binder. Binder also includes a fast-reference label holder and exposed rivets.