looking for folding handle

A handy person from Boxford, MA says:
These handles do not fold and get in the way of the blinds. The handle says "norco" on it. If I have measured it correctly, it is a 5/16" spline. Please suggest a folding handle that can replace these. Thank you.
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Paul from SWISCO responded:
Our 39-205 folding handle might work for you. It has a spline size of 11/32", though. Can you double check your measurements?
A quick learner from Boxford ma says:
I just remeasured and it is 5/16. Also, there is a picture on the Home Depot website of what the various-sized splines look like, and this one matches the 5/16 photo. Seems this is not such a common size.
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Tom from SWISCO responded:
We only have one handle with a 5/16" spline, and that is our 39-274. I do not think this is what you have, though. 5/16" is only 1/32" from 11/32". I highly recommend you get a more accurate measurement.
A quick learner says:
Short of buying some accurate calipers, I'm not sure how to get a more accurate measurement. I appreciate your thought, though. I think I might run down to Home Depot and pick up cranks they might have in 5/16 and 11/32 to see which one fits. Thanks. I will undoubtedly be back.
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