Simple Replacement: Forget complex installations. MJK's CORE Key system allows you to swap out lock cylinders quickly and effortlessly. All it takes is a simple turn using the CORE Key – no need for extra tools or assistance

Reduced Costs: Traditional lock replacements often involve purchasing all new locks and paying for installation fees. The CORE Key system eliminates these expenses. By simply replacing the CORE, you save money on both materials and labor

Enhanced Flexibility: Pair with MJK Master Keys for additional security control