A life saved! I got an O2 sensor tool on loan from a local parts store. They removed my old O2 sensor! Pooh. The O2 probe was as good as welded in there after 172,000 miles. After trying several different heads, liquid wrenches, torches and tongs, he was ripped off even worse! I ordered this tool as a last resort and after cutting and trimming the old O2 sensor to gain access to the nut, this tool pulled it out in seconds. We recommend.