Ministry of Social Development and Human Security building /Local/TH/references/Ministry%20of%20Social%20Development%20and%20Human%20Security%20building/Ministry%20of%20Social%20Development%20and%20Human%20Security%20building_1.png The government project that want high security lockset with Master Key system. Challenge The government project that want high security lockset with Master Key system. Solution We work very close with the contractor and suggested them to use MUL-T-LOCK MT5 cylinder.