What is the diameter of the inside hole?

A home owner from Marlboro , Ma. says:
What are the measurements for the inside hole? product # 39-117
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Tom from SWISCO responded:
The diameter of the inside hole is approximately 5/16".
A quick learner from Marlboro , Ma. says:
I need 15 crank handles for my mobile home windows. The measurements are: 2 1/2" inside hole is 3/8 " . Do you have this in stock? Maybe something I can modify? I've looked eveywhere!
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Tom from SWISCO responded:
Submit a couple photos of your crank handle so we can take a look and start researching possible replacements.

Be sure to include any additional dimensions along with your submission.
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