Durable and stable: the D6X is a great choice for equipping your home or apartment door with a sturdy cylinder lock. This cylinder lock features special internal pins, making it difficult to pick. The emergency and danger function ensures that the door can be opened or closed even if the key is already on one side. The added bonus: this cylinder lock comes with a code card. By referencing the code number on it, you can order additional keys and cylinder locks from the specialized supplier.