Contour Cover Reference Binder features a curved-back spine for a more comfortable grip. Unique construction of the cover easily houses oversized indexes & sheet protectors. Soft Click D-rings open with one easy motion, increasing productivity & comfort. One-touch rings are mounted on the back cover to reduce wear & 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 & exposed rivets.