T- crank

A quick learner says:
I am trying to replace the handle on a jealousy window. I already ordered part 39?108. The 3/8 part fits perfectly but the T hits the side box mechanism. So I either need one that is a longer Spline I believe that's what you call it or the T part of the handle is shorter.
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Tom from SWISCO responded:

We unfortunately don't sell a version of the 39-108 with a shorter "T," but we do sell the 39-422 2" extension. Would that be long enough to get this part operational again?

Alternate image for 39-422
Alternate image for 39-422

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