5 DIFFERENT SIZES1/2/3/40, the screw extractor is suitable for most drills/screws/bolts to meet your different needs. Provide a matching plastic box for your convenience.HIGH QUALITY HSS: The screw extractor uses a harder material than other spiral extractors on the market.HSS is the tool material of choice for professionals.EASY TO USE: Only two steps are enough to remove damaged screws. Use an appropriately sized screw extractor to drill an adjustable size hole and extract the screw or bolt. You can work with different drills and all sizes of screws and bolts.EFFICIENT REMOVAL - With the high hardness damaged screw removal tool, you can easily and quickly remove even the most stubborn damaged/embedded/rusted/painted screws and bolts.Product Description Features Material: High Speed Steel (HSS 4341) Standard: 1 , 2 , 3 , 4 , 0 Hardness: HRC63 Package Included: 5 x damaged screw extractor 1 x Black Plastic Tool Box Dimensions Model/Dia/Length 1/6.35mm/51mm 2 / 6.35mm / 51mm 3/6.35mm/51mm 4/8.78mm/51mm How to use Drill a hole in the position shown, then unscrew it with the puller for virtually effortless removal. In seconds you will be able to remove the most stubborn, stripped, broken, damaged, sunken, rusted or painted screws and bolts from their mounting points with the utmost of ease.