Builders, mechanics, hobbyists...everyone needs a bolt extractor set! Made in the USA by Norseman CTD (Viking), this 10 Piece Bolt Extractor Left Hand Drill Set is high quality and convenient. Using the left-hand drills often eliminates the need to use the extractor, but the screw extractor is included if needed. First, use the left-hand drill to loosen the bolt stud while also drilling a hole to insert the extractor. The stud may loosen and be extracted with the left-hand drill, if it is not, proceed to use the extractor to remove the stud. Packaged in a sturdy, heavy duty metal carrying case. Conveniently opens from the top of the case to present the bits standing vertically.