Large 70mm iron shell zinc core interior door lock core, with 5 computer keys, surface treatment chromium, can be ordered according to customer requirements for other models, specifications, and different materials of keys, different configurations. Our company has more products to introduce one by one, with steel, copper, iron, zinc alloy as the main products, single-open and double-open options are available. Our company has strong strength, high quality and low price, adhering to the principle of quality for survival and variety for development, pursuing the principle of mutual benefit and win-win to steadily develop. Welcome to the company for on-the-spot inspection.