Extractor will not expand material being removed resulting in easier removal. Ideal for thin-walled materials such as pipe and fittings. Constructed of high carbon steel for strength under stressful conditions. Extractor size and recommended drill bit size are etched on each extractor resulting in easier removal. Ideal for thin-walled materials such as pipe and fittings. Constructed of high carbon steel for strength under stressful conditions. Extractor size and recommended drill bit size are etched on each extractor