Has a flip lock inside which goes into a piece attached to the frame of the door and a key lock on th the outside of the door
Bob from SWISCO responded:
January 16, 2020
Thanks for writing in. See our 82-005. Look over the dimensions and see if you think this could replace your old lockset. For a new outside keyed pull, see our 82-306. let us know if you have any further questions.