Broke my water pump bolt. Now what? (Update - broken bolt is out)

cruiser said

So how do they work? How do you use them? Thanks - cruiser

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You just hammer on the extractor the size that you need for the broken stud, then use a wrench, or socket and ratchet, on the flats of the extractor, and then twist away.
I found them to be quite useful, but I'm sure they also have their limits.