Drop-forged Chrome Vanadium steel sockets, heat treated & chrome plated with a fully polished mirror finish for corrosion resistance. S2 Steel stubby TRX-Star* bits with a zinc phosphate finish. Ideal for limited access applications. Contents: T8, T10, T15, T20, T25, T27, T30, T40, T45, T50, T55, T60. Knurled ring for extra grip with greasy fingers. Supplied on socket rail. Model No. AK6228