All the things we use around us have a life span. The higher the frequency of use, the life of the object will be much shorter, but proper maintenance is a way to extend the life of the object.

There will be a lock on each ordinary community letter box, and each lock corresponds to a key. If the key is lost, it can be replaced, and it is very convenient, but it is very troublesome to replace the lock if it is broken. The damage of the lock on the box may be caused by man-made damage, or it may be caused by improper use and daily maintenance.

Therefore, your mailbox lock needs to be lubricated regularly, such as once every 3-4 months. If your mailbox is exposed to harsh environments, such as close to the beach or main roads, your regular maintenance frequency will be higher.

For example, "3-in-1" light oil suitable for smooth locks, "Ezi-Glide" or "Inox" spray such as Castrol Handy Oil or other light oils provided by most retail outlets is suitable for box keys. The use of this light oil product can protect the lock for 3-4 months.

If this kind of regular maintenance is carried on, coupled with the quality of the material of the community’s non-letter box, I believe that the lifespan of your letter box will be prolonged.