Purchased wrong crank set

A handy person from Atlanta says:
I have one that I purchased from you guys that's too big and I need this one instead, is this 39-035?
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Tom from SWISCO responded:

No, the 39-035 won't work for you. That has a hinged arm and this arm is straight. See our 39-217, I think you'll find this is a better match.

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