Samsill DXL/Contour Cover 3-Inch Ergonomic View Binder, Navy (17782) Your Perfect Fit! Designed for comfort, a professional look and oversized function. Curved back spine provides comfort grip Compact design easily houses over-sized indexes and sheet protectors without overlap Soft Click locking D-ring - opens with one simple motion Stronger hinge for constant use; created with a special ribbed seal