hotel door lock system lock 1.Made from Stainless Steel 304. ... 400,000 Cycle Tested. 3.CE UL 4.nickel- coate hotel door lock system lock doorCylindrical Door LockMaterial: iron/zinc alloyDoor ... alloy/brassKeys: iron/brassPopular applied for entrance, bedroom, bathroom, storage, hotel doorProfessional designEasy to installHigh safety, good quality, good pricePacking: double ...