These SuperStrength Ring Binders from Cardinal certainly live up to their name! Equipped with an extra firm locking mechanism, these binders are practically guaranteed to prevent spills and ring gaps. You can have confidence that your pages will remain secure and protected at all times. With various ring sizes to choose from, starting with 1" and going up to 5", you can also pick the right color for your needs, from classic black and white or modern blue, red and maroon! All these SuperStrength binders have the patented Expand-A-Pocket in the back that holds an additional 1/2" stack of paper and feature the Slant-D rings, for extra 25% more sheets than standard rings! With so many impressive qualities why haven't you ordered yours yet?