9 Piece Bolt Extractor Set is just what you need to get yourself out of a jam. This set includes 9/16",5/8",11/16",3/4",1/2",7/16",3.8",5/16",and 1/4" bolt extractors. These extractors work with 3/8" drive socket wrench or a standard wrench.This Hanson Bolt Extractor Set is just what you need to remove those damaged and rounded nuts and bolts.