6pc SAE Roller Cam Stud Extractor Set

For removal or installation of studs. Simply put the socket over the stud, then just turn in either direction using a 1/2inch drive ratchet or wrench. Roller cams grip firmly onto stud. Comes in blow mold case. 6pc SAE set contains: 3/16, 1/4, 5/16, 3/8, 7/16 and 1/2inch. Drive 1/2inch.