Quote:
Originally Posted by 71CHEVYSHORTBED402
Dang dude, that a GR 8 bolt? Took me forever to drill a GR 8 3/8" out of a head, heck my big ask son had to finish it. I like Irwin bits, but........
Good to know. With a hammer drill?
Lots of good ideas above.
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No sir just in a normal drill at medium speed works pretty good. They will go dull but it takes a lot longer. Lefties work great too but getting them started in hardened steel can be a pain in the ass, definitely the best case is the lefty hooks and spins the whole thing out.