crank handles

A contractor from massachusetts says:
I need four crank handle 12 spline 7/16" bore. Your T handle probably wouldn't have enough leverage,do you have any 7/16" 12 spline regular or preferably folding handles in bronze or white if necessary. Old handle said FEIN in a oval logo.
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Donna from SWISCO responded:
I am not familiar with a 7/16" gear bore. Are there any brand names or markings on the operator? Check the operator arm.
A professional from Massachusetts says:
I believe it is a Caradco product. Your T handles have 7/16" bores
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Donna from SWISCO responded:
The Caradco operators that I am familiar with use an 11/32" spline. Take a look at SWISCO product code 39-205 for a folding handle with an 11/32" gear bore.
A quick learner says:
The bore is definitely bigger than 11/32 as it is past the 3/8" mark which is 12/32
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