EZ out

On a related note, this penetrating oil is the best on the market. I've had a can of it for 20 years. Works awesome. All do-it-yourselfers and shops would do themselves a favor keeping a can of this stuff around.
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Please, don't anybody reply with "WD40", that stuff is worthless.

You can also find bolt extraction tools on that site.
Here is one example of an EZ out
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