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The original was posted on /r/tools by /u/pglggrg on 2023-09-05 05:18:08+00:00.

So I have a bolt in my engine which had its head snapped off from overtightening. Just wondering if there’s a particular amount of torque or rating for a drill in order for me to drill a hole through it to extract it.

Or is the material of the drill bit more important? I have a very cheap Harbor freight 12v drill. And an extractor set. Last time I tried it, I didn’t use a punch to make a hole so the drill didn’t work. Eager to try again, but wondering if I need a better drill.