Features and Benefits: 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 Lifetime warranty 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. 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. Sizes include: 1/4" Drive - T8, T10, T15, T20, T25, T27 and T30 TORX Bit Sockets; 3/8" Drive - T40, T45, T47, T50 and T55 TORX Bit Sockets; 1/2" Drive - T60 TORX Bit Socket; 1/4" Drive - T7, T8, T10, T15, T20, T25, T27 and T30 Tamper-Proof TORX Bit Sockets; 3/8" Drive - T40, T45, T50 and T55 Tamper-Proof TORX Bit Sockets; 1/4" Drive - E4, E5, E7 and E8 Female TORX Sockets; 3/8" Drive - E10, E12, E14 and E16 Female TORX Sockets and 1/2" Drive - E18 Female TORX Socket. Packaged in a blow molded case.