How a pin tumbler lock works
Five pins, five splits, one shear line. Why a lock opens with the right key and not with force.
Five pins, five splits, one shear line. Why a lock opens with the right key and not with force.
If the lock still works and the keys are the problem, rekey. If the lock is worn or weak, replace it.
A fixed price on the phone, ID before the door, and no drilling you did not agree to. Three things honest locksmiths do.