The Sheffield folding Lock Back® Utility Knife features a one-hand opening operation for ease of use allowing you to cut through all obstacles such as paper, cardboard and more! Also boasts a quick-change mechanism for a quick and easy blade replacement procedure using standard utility knife blades. The Lock Back® Knife is constructed of a lightweight aluminum handle and includes a belt clip for your convenience. Go ahead, cut through twine, boxes and more with "ultimate" ease. As always, Sheffield has your back.