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Title: Countless $$ saved drilling out cylinder head bolt on Diesel jetta
Review: A few weeks ago I bought a Jetta diesel as a project car for really cheap, as it had needed a new head gasket. The only catch: A stripped headbolt. The bolt was their special triple square design. I could have used a stud extractor if the space around it would have allowed: It did not. I decided to drill off the head, but had very poor results with some dewalt bits. I got these, and while working, periodically backed it out to eject all the metal shavings, and sprayed WD40 in the hole. When I was finished, the bit looked almost like new, just barely worn through the TiN coating on a few spots on the tip. Job well done, it'll live to drill another day. Thanks, Bosch, for an awsome drill bit. Save the other brands for the non-important jobs, bosch is the only brand I trust to do critical work!
