Wilson Jones Heavy Duty Hanging Round Ring Vinyl Binder, 1 Inch Capacity, Letter Size, Black (W364-14NBA) Hanging binder features retractable hooks and traditional round rings for maximum ease of use; 200 sheet capacity in 1 inch binder size Round rings lock to secure papers better; fits most standard file cabinet drawers or file frames Retractable hanging hooks and label holder on spine (inserts not included); heavy duty vinyl covers