The Sheffield Utility Series 12113 ultimate Lock Back utility knife features a one-hand opening operation for convenience as you cut through obstacles such as paper, cardboard and more. This Sheffield utility knife also boasts a quick-change mechanism for a quick and easy blade replacement procedure, using standard utility knife blades. It features a lightweight aluminum handle for ease of use and includes a belt clip for easier carrying. You're all set to cut through twine, boxes and more with ultimate ease. As always, Sheffield industry leading lifetime warranty has your back.