The SheffieldA(R) Utility Series 12115 premium Lock BackA(R) utility knife features a one-hand opening operation for ease of use allowing you to cut through obstacles such as paper, cardboard and more. This SheffieldA(R) utility knife also boasts a quick-change mechanism for a quick and easy blade replacement procedure, using standard utility knife blades. For even more attributes, this SheffieldA(R) Lock BackA(R) knife is constructed of a lightweight aluminum and hardwood handle and includes a belt clip for your convenience. So go ahead cut through twine, boxes and more with ultimate ease. As always, SheffieldA(R) industry leading lifetime warranty has your back.