Expert Quality, manufactured from chrome vanadium steel, hardened and tempered with a polished finish. Supplied on a socket retaining bar. Contents: • 1/4" sq. drive: E4, E5, E6, E7 and E8 • 3/8" sq. drive: E10, E11, E12 and E14 • 1/2" sq. drive: E16, E18, E20, E22 and E24