This 35 piece set is made in the U.S.A and is our most complete TORX bit socket set. Bit sockets feature SK"s high polish SuperKrome finish, which provides for long life and maximum corrosion resistance. Through-hole design makes it easier to replace worn or broken bits: simply pop the old bit out and insert a new replacement bit. The new bit holder design is 9 times stronger and helps prevent the bit from slipping out of the socket while working. Bits are manufactured to rigid standards using high strength S2 steel. This set also features Tamper-Proof TORX bit sockets, designed for use on tamper-resistant hex fasteners found in a variety of industrial and institutional settings, and Female TORX sockets, manufactured to rigid standards. With the help of an extension or universal joint, sockets can be used in awkward spaces. SuperKrome finish provides long life and maximum corrosion resistance. Through-hole design: simply pop the old bit out and insert a new replacement bit. New Bit Holder Design is 9 times stronger and helps prevent the bit from slipping out of the socket while working. High Strength, S2 steel bits. 1/4" Drive T8, T10, T15, T20, T25, T27, and T30; T7, T8, T10, T15, T20, T25, T27, and T30 tamper-proof sockets; sockets; E4, E5, E6, E7, and E8 female sockets; 3/8" drive T40, T45, T47, T50, and T55 sockets; T40, T45, T50, and T55 tamper-proof sockets; E10, E12, E14, and E16 female sockets; 1/2" drive T60 socket; E18 female socket.