On Tue, 27 Sep 2016 09:15:01 -0700 (PDT),
wrote:

I have one at my house. We figure if we ever want to replace it we will have to replace the whole door.

I think it was "The Brady Bunch" who had a middle of the door, doorknob.
Yea, that was a show from the 60's. It was one of those fads that proved
to be a failure and did not last long.