Crank extensions

A quick learner from Florida says:
I need a 3/8 inch to 3/8 inch extension for older casement windows 2,3 or 4 inches long. Do they exist?
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Dave Sr. from SWISCO responded:
The only 3/8" extension we have is the 39-422, which is only available in 2". You might need to install two together if you need something longer. Could that work?
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