Five reverse-fluted sockets make up the Duralast Spiral Bolt Extractor Set used to free damaged nuts and bolts in minutes. An internal taper allows the robust extractors to fit metric and standard applications. For versatility and ease, the chrome-moly sockets are designed for use with 3/8" drive ratchets, wrenches, and even power tools to make the job easier. The corrosion-resistant finish guarantees a lifetime of use.