Andersen Casement folding handles

A home owner from New Hope, PA says:
May 6, 2015
Greetings! Due to new window shades (top down/bottom up), I need to replace my Andersen Casement crank handles. The existing handle has the serial # 7191 (house built 1993-94). Will 39-301 fit the existing spline? Thanks for your attention.
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Paul from SWISCO responded:
May 7, 2015
If your current operator is Andersen brand then I imagine our 39-301 will fit, yes. What is the size of your existing spline?
A home owner from New Hope, PA says:
May 7, 2015
The inner circle is 1/4". The "nubs" bring it to 3/8". It protrudes from the housing 5/8". Below's a pic & thanks for your prompt response.
User submitted photo of their window operator.
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Paul from SWISCO responded:
May 8, 2015
Thank you! Yes, I believe our 39-031 will fit. This can work on most Andersen operators of this type and yours shouldn't be any exception.
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