The “DO NOT COPY” Key Stamp is a heavy-duty marking tool designed to permanently imprint keys with a clear, professional-grade security warning. Made from hardened steel, this stamp delivers deep, legible impressions on brass, nickel, and other common key metals, helping deter unauthorized duplication and improve key control in residential, commercial, and institutional environments. 🔩 Product Features: Text: DO NOT COPY Material: Hardened steel Usage: Manual hammer-driven key stamping Application: Compatible with most brass and nickel-plated keys Finish: Precision-ground for clean and uniform impressions Use Case: Perfect for locksmiths, property managers, security professionals, and hardware stores 🛠️ Common Uses: Marking master keys and high-security keys Enforcing restricted key duplication policies Enhancing tenant, employee, or building access control systems ⚠️ Important Notes: Use with a hard backing surface (steel or anvil recommended) Safety goggles and gloves are recommended during use For best results, strike firmly and evenly with a hammer