I don't think about it, because I would never, ever stress a folding knife, even a locking one, in such a way as to put stress on the lock. Locks on knives are not meant to be stressed, they are only there to prevent accidental closure. The stress on a folding knife should only ever be in the direction that keeps the blade open. If you need to do heavy work with a knife, you need a fixed blade knife, period.