Manufactured from chrome vanadium steel. 5pc 1/4" drive Torx sockets: E4, E5, E6, E7, E8. 6pc 3/8" drive Torx sockets: E10, E12, E14, E16, E18, E20. 10pc 3/8" drive bit sockets: T10, T15, T20, T25, T27, T30, T40, T45, T50, T55. 7pc 1/4" drive bit: T10, T15, T20, T25, T27, T30, T40. 1pc 1/4" drive bit holder. Supplied in blow moulded storage case