Manufacturer: Stanley Proto Mfr. Part No.: 9500B10-Piece Square Section Screw Extractor SetThis 10 piece screw extractor set can be used to to remove broken, rusted, cross-threaded or otherwise damaged screws. These professional tools are designed to provide an efficient method for extracting machine screws, studs, cap screws and other types of threaded fasteners that have been partially destroyed preventing their normal removal.Features and Benefits• Made from high-carbon alloy steel that is very strong and fracture resistant • The gradual taper prevents wedging and seizing • Unique corner enables a positive bite for removing the stud without damaging the object the stud is being removed from • Works on both right and left handed fasteners • Each piece is stamped with a size that matches the drill bit to be used with the extractorTypical Applications:Screw extractors are tools designed for extracting broken screws and nuts that have been damaged preventing their normal removal. Extractors are made from extra hard steel that allows for drilling or hammering extractors into a screw and further removing by turning with a wrench. Screw extractors are commonly used by:Mechanics Engineers Machine Service Specialists Technicians DIY enthusiastsFAQs: What tip sizes are supplied in the set?The set consists of 1/8, 3/16, 7/32, 5/16, 3/8, 7/16, 17/32, 5/8, 3/4 and 1 inch wide extractorsSpecifications Attribute Value Number of Pieces 10 Set Contents 1/8' 3/16' 7/32' 5/16' 3/8' 7/16' 17/32' 5/8' 3/4' 1 in Material Carbon Steel