Crestline Window Crank

A quick learner from Illinois says:
Hello,
I have attached some photos of window cranks we currently have that do not work very well. I am looking to replace them with the longer more standard window crank handle if possible. These small attachments seem to strip the grip and are very difficult to open & close the windows. Do you have suggestions on a larger crank that would work for this model? Thanks for the help
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
It's hard to tell the diameter of the spline based on just the tape measurer. These tend to be very specific. I would measure it as carefully as you can to confirm if it's 11/32", which I suspect it might be. If it is, see our 39-114L.
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