Hello! The crank dial thingie is stripped so that you have to manually pull the window open and then the crank resumes working to full open. I do not have the crank - my dad lost it years ago so I tried with one from another window and that is what I discovered. The thing is heavy - steel, maybe? The arms are 21.
When the arms are condensed like the window would be closed, they measure 21.5" across. The steel plate part is 5" across.
Thanks in advance!!