Quick Fit Binder features a unique overlay design that allows a single sheet to create a one-piece custom insert that wraps around the spine to the front cover. Customize your title sheet with free online templates. Overlay resists ink transfer. Locking, round rings are made of steel and hold letter-size sheets. Designed for frequent reference and longevity, heavy-duty construction includes polypropylene and recycled solid board. 1" binder also offers an antimicrobial coating, two clear inside pockets and exposed rivets.