The Sheffield Utility Series 12116 Mini Ultimate Lock Back Utility Knife is proof that great things, especially great sharp things, comes in small packages. Featuring a one-hand opening operation for ease of use allowing you to cut through all 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. For even more attributes, this Sheffield Lock Back Knife is constructed of a lightweight aluminum handle and includes a keychain for your convenience! So go ahead cut through twine, boxes and more with "ultimate" ease. As always, Sheffield's industry-leading Lifetime Warranty has your back.