Cal-Van Tools Master Torx Bit Set features a complete set that provides the most torque for all applications. It has bits composed of S2 phosphate manganese. It comes in a blow molded case for easy storage. It includes: Torx bits: T-10,T-15,T-20,T-25,T-27,T-30,T-40,T-45,T-47,T-50,T-55. It is tamper-proof: T-10,T-15.T-20,T-25,T-27,T-30,T-40,T-45,T-50,T-55. It has Torx sockets: E5,E6,E7,E8,E10,E12,E14,E16,E18,E20. It also includes: a 1/4 inch bit holder, a 3/8 inch bit holder, a no.488 twin spin drive converter and a no.906 finger bit driver.