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

Here's a set of stud extractors that i have used numerous times in my life as an auto mechanic, when i was doing that job for my living.
Now I'm old and retired, so i do things in the garage,as far as rebuilding brake and suspension parts.
I don't know where i got these extractors, or when i got them.
But most likely off a Mac, Snap On, Matco, tool truck that came by the shop on a weekly basis.
These extractors work quite well if you have enough of the broken stud, to hammer the extractor onto the broken stud.
These have saved me lots of time, and labor using then on frozen, or rounded off, bleeder screws, or flare nut fittings on brake calipers.
I'm sure they work on other things that you can think of.


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