The Sheffield 12514 3 Pack of Folding Lock Back Utility Knives all feature a one-hand opening operation for convenience as you cut through obstacles such as paper, cardboard, and more! These Sheffield Utility Knives also boast a quick-change mechanism for a quick and easy blade replacement procedure, using standard utility knife blades. They feature lightweight aluminum handles for ease of use and include a belt clip for easier carrying. You're all set to cut through twine, boxes and more with "ultimate" ease. As always, Sheffield's industry-leading Lifetime Warranty has your back.