This is the Dough hook that came with the lift bowl mixers . It actually kneads and stretches the dough . Like you said the " C " hook lifts the dough out of the bowl .
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I was looking for the chutes to add ingredients , and ended up with an aftermarket .
It works good for eggs and liquids . Flour gets all over the place .
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Posting because I just went through this last Christmas buying these as gifts .
I think you're best off to get the real deal parts from Kitchenaid , but even at that It's hard to know what you need . That's why I ended up with the aftermarket chute .
Couldn't figure out which chute fit what bowl .
Anyway , if you mix a lot of bread dough , that hook is the one to have .