Two piece bits are made from S2 steel and set in Chrome Vanadium Socket Blow molded case Lifetime warranty Set includes: star bit 1/4" dr.: T8, T10, T15, T20, T25, T27, T30; star bit 3/8" dr.: T40, T45, T47, T50; star bit 1/2" dr.: T55, T60: tamperproof star 1/4" dr.: T10H, T15H, T20H, T25H, T27H, T30H; tamperproof star 3/8" dr.: T40H, T45H, T50H; tamperproof star 1/2" dr.: T55H; star 1/4" dr.: E4, E5, E6, E7, E8; star 3/8" dr.: E10, E12, E14, E16; star 1/2" dr.: E18, E20. This new Sunex Tools® set is the only set you need to tackle any star fastener application. It combines internal star bits and external star sockets into one master set.