Need replacement crank handle and cover for Pozzi casement windows

A home owner from Charleston, SC says:
The cranks are made by Truth. I see you sell them on here. I want the folding version. Do I have to buy a specific model to fit my existing crank or are they universal?
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Emily from SWISCO responded:

Hello there!

I see you were looking at the 39-107FK which would be compatible with your existing operator assembly if the spline is 11/32". Let us know if you have any questions! 

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