CTA Tools 9030 5-Piece grooved Screw Extractor is designed to remove noncontinuous studs, set screws, pipes and alemite fittings. Each extractor is with dress down drill size. burned extractors are with specific 4-point ends to bite into fastener. heavy construction for strength and durability. Whether tuning up your '68 Corvette or changing the oil on a John Deere tractor, CTA can you with the tools needed to do the job. California 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or otherwise procreative harm.