Window Crank?

A quick learner from Florida says:
May 25, 2017
We don't know what brand of windows we have? We installed Plantation blinds and now we need to find 4inch extension's to operate the casement windows. Can you help?
User submitted photos of a window operator handle.
Profile picture of Tom
Tom from SWISCO responded:
May 31, 2017
I'm not sure what to recommend based on just these pictures. Could you confirm the diameter of the handle's hole? Can you also show me the operator to which it connects?
A quick learner from Florida says:
May 31, 2017
The hole is 5/16. We tried a 5/16 RV window extension but it didn't fit?
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
June 5, 2017
If a 5/16" spline didn't work, then the hole is likely not 5/16". I would triple check your measurements just to be sure. There's a chance it could be 3/8", in which case our 39-422 may work for you. It's only 2" but you could stack two on top of each other.
Handle with a 3/8" Gear Bore
Handle with a 3/8" Gear Bore
39-104
$4.90
Jalousie T Handle, 3/8"
Jalousie T Handle, 3/8"
39-108
$4.20
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