World Kitchen XH-AL Fiberglass Reinforced Auto Lock Utility Knife Auto-locking mechanism provides a secure hold resulting in dependable and safe cutting performance Heavy-gauge stainless steel blade channel provides secure blade hold for ultimate cutting performance Durable, chemical resistant handle materials provides prolonged tool life Tool free blade change is fast and easy Suggested uses - precision cutting carpet, fiberglass, expansion board, gasket materials, high pressure laminates, etc