Using the MasterLock 175D is a breeze. First, to set your own combination, use the included combination change key. Turn the dial clockwise a few times to clear any previous settings. Then, set your desired 4 - digit combination. Once set, you can lock and unlock the padlock easily by turning the dial to your chosen numbers. When locking, simply close the shackle firmly. As for maintenance, keep the padlock dry to prevent rusting. Avoid exposing it to extreme temperatures or harsh chemicals. If the shackle seems stiff, you can apply a small amount of lubricant. Remember, always keep your combination private for maximum security.
