S&G Change Key U11
Suitable for all 4-wheel 6600 and 6700 series combination locks.
regular change key for S&G vault locks, four wheel post 1956
Older style T8400MP locks required a model 8400 change key, which is now obsolete. These locks are identified by the presence of a change key hole that is flush with the surface of the cover. A standard 4-wheel change key can usually be substituted for the obsolete key.