Heavy-duty binder features a single-touch, gap-free rings to easily open, close and load paper. Locking D-rings keep your documents securely contained during storage or travel. Quickfit overlay allows you to use a single sheet of paper to create a custom insert that wraps around the spine to the front cover for easy insertion and quick identification. Double-hinged cover takes up less space on a shelf for space-saving storage. Ink transfer-resistant overlay and interior front and back cover pockets resist sticking to inks to maintain clean appearance. Antimicrobial polypropylene material helps inhibit the growth of bacteria for long-lasting use.