Screw extractors need to be treated with caution. General advice I've seen from people restoring old cars and the like is to avoid them as when they break in use it makes the initial problem very much worse.
@Mirius started
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Screw extractors need to be treated with caution. General advice I've seen from people restoring old cars and the like is to avoid them as when they break in use it makes the initial problem very much worse.