1. When the lock head is used, Jamlom graphite powder or pencil powder can be applied to the lock core groove periodically (half a year or one year) or when the key insertion and removal is not smooth, so as to ensure the smooth key insertion and removal. However, it is forbidden to add any other oil for lubrication, so as to avoid the grease sticking to the marble spring, which will make the lock unable to turn and open.

2. The transmission part of the lock body should always keep lubricant to keep its transmission smooth and prolong its service life. It is recommended to check once every six months or once a year to check whether the fastening screws are loose and ensure fastening.

3. Anti-theft door lock In the process of opening and closing the door on weekdays, it is best to hold the handle, screw the lock tongue into the lock body, and then let go after closing the door. Don't slam the door, otherwise it will shorten the service life. Do not wipe the lock body and handle with wet cloth, because some metal locks will rust; Locks made of alloy will wear off the coating and lose their aesthetic effect.

4. Always check the fit clearance between lock body and lock plate, whether the height of lock tongue and lock plate hole is appropriate, and the best fit clearance between door and frame is1.5mm-2.5mm. If any change is found, adjust the position of hinge or lock plate on the door.