Expert Quality, manufactured from chrome vanadium steel that's hardened and tempered with a polished finish. With a hole in the drive end of the sockets for ball retention. Packed on socket retaining bar with hanging hole at each end. Display packed. Contents: 3 x 1/4" sq. dr. sockets: E6, E7, E8, 4 x 3/8" sq. dr. sockets: E10, E12, E14, E16 Draper TX-STAR® ; products are compatible with †Torx fixing systems