Draper 55641 Stud Extractor Set, 1/2" Sq. Dr. (4 Piece)

Roller type with 1/2" square drive or 21mm hexagon on end of socket. Unscrews both left and right hand threads. Manufactured from chrome vanadium steel hardened, tempered and chrome plated for corrosion protection.Contents: 6, 8, 10 and 12mm