ROTO Metal crank operator hardware

A home owner from Fall River, MA says:
I have three crank windows that the metal crank operator that opens and closes the window literally rusted out and broke so the arm does not work. As well as the crank that you use to open an close it. Which model would I need for these.

I believe thay are both Roto. Roto OP052020 for incasement crank and Roto OP05-7810 that you use to crank the window.

Also any idea how exactly I would take this off and then reinstall the new one?

I also need to find and order the casement that attaches to the window as well. They have rusted off completely and the crank that opens that broke.

I need three Roto model #OP05-7810 (Crank to operate window from inside)
I need three Roto replacement Operator model #OP052020 (with window opening out to right)
I need three Roto replacement Operator HG04-2004 (With window opening to right)

Also how do you take these out and put the new ones on. I am clueless in this.....
User submitted photos of a window operator.
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Tom from SWISCO responded:
Thanks for posting! Your handle appears similar to our 39-226 OKNA Folding Handle with a hex drive. What do you think? Keep in mind that we have a limited supply of this item.

I'm not so sure about the operator, though. Could I see a few pictures of the base? Seeing just the arm only tells me half the story. Let me know!
A quick learner from Hanover,Ma says:
I have similar issue with crank handles. They fall off. I am not handy but was wondering that when you install new 39-226 OKNA Folding Handle with a hex drive there a way to tighten? Are there instructions I can read?

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Tom from SWISCO responded:
There's not really a way to tighten this kind of handle. If it's falling out, then it may be a problem with the female hex on the operator. It could be worn and stripped out which means the whole operator has to be replaced.
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