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The LISLE TOOLS AUTOMOTIVE THREAD CHASER SET is a high-quality set of hand tools designed specifically for automotive use. Made by the trusted brand Lisle in the United States, this set includes thread chasers for both spark plug and O2 oxygen sensor threads. With the manufacturer part numbers 12230, 20200, and 20020, this set ensures precise and efficient maintenance and repair of automotive threads. Perfect for automotive professionals and DIY enthusiasts alike, this thread chaser set is a valuable addition to any toolbox.