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The Great Neck 12119 Sheffield Quick Change Lockback Utility Knife delivers professional-grade performance for demanding cutting tasks. Its quick-change blade system allows seamless transitions between sharp blades without fumbling with tools, maximizing efficiency on the job. The lockback design provides secure blade retention and safe handling during extended use. Constructed with durable materials, this knife withstands rigorous daily applications. The package includes five replacement blades, ensuring you're equipped for multiple projects before restocking. Ideal for contractors, tradespeople, and serious DIY enthusiasts who demand reliability and precision.