From a design and function standpoint, Slant D-Ring Binders are superior to Round-Ring designs. Because one side of the rings are straight, you can store up to 25% more paper. Also, because the mechanisms are mounted to the back cover instead of the spine, the sheets in the front or back aren't constantly ripping like on round-ring binders. Come see our assortment of D-Ring Binders. We're sure to have models that are right for you.