
Irwin 11119 Review: Irwin Industrial Tools 11119 Metal Index Spiral Flute Screw Extractors with Left Hand Cobalt Drill Bits Set, 10-Piece. I bought this item after reading several chat room discussions about removing exhaust manifold studs that have broken off in the cylinder head. I'm not sure if it was the fact that the bits were left handed (have to run the drill in reverse) or that they were cobalt coated, or what it was, but, the bit worked great and the extractor backed the stud out with no problem. A couple of notes: 1. I heated the stud with a propane torch and immediately pressed an ordinary household ... Read more »
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