NORTOOLS 13 PCS 3/8” Dr. Broken Stripped Damaged Bolt and Nut Extractor Remover Threading Tool Kit Set Metric and SAE

MATERIAL: Sockets are made from Cr-Mo high carbon steel, 48-52 HRC, with sharp cutting edges that easily bit into seized bolts & nuts, SIZE INCLUDED: The set includes Metric and SAE sizes - 1/4", 5/16"(8mm), 3/8", 10mm, 7/16"(11mm), 12mm, 1/2", 13mm, 9/16"(14mm), 5/8"(16mm), 17mm, 11/16", 3/4"(19mm), DESIGN: 3/8” square drive for use with socket wrench or impact wrench. Universal lobular design fits all types of fasteners. Reverse spiral flutes are designed to bite down to provide maximum gripping power, APPLICATION: Can be used on screw heads and studs. Superior bolt & nut busting power, for removing damaged, rounded off, painted over and rusted bolts & nuts. It will provide your daily work more convenience in car repair, home decoration, for craft production etc, PACKAGE: All pieces of this set fit securely within a durable blow-molded carry case for easy organization and convenient portability