Converting our window crank to a folding crank

A quick learner from USA says:
We are interested in replacing our straight crank window handle to a folding crank handle (white) having a 5/16 hex inside handle, Would you be able to help us?
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Paul from SWISCO responded:
Sure, our 39-225 has a 5/16" hex and can be folded down. Would that work?
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