I don't know how long my lock will last. I've chosen this lock rather than another one and other less secure one because I want it to last a lifetime. But i suspect i know how my lock will die as i got an idea of it last year when the tumbling system stopped working properly once by lack of lubricant. I repaired it pretty easily by adding some lubricant. Only time will tell how and when this lock will die but other than the locking mechanism it seems pretty much timeproof.