Spiral Screw Extractor SetExtractor 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. Includes: 5-pieces Pouched, Sizes ST-1 thru ST-5; Quantity: 5 per set; Weight: 0.39 lb.