Product Description SK Tools USA 1/4" & 3/8" Drive, 12 Piece, Standard, Chrome Tamper-Proof TORX® Bit Socket Set: T7 - T55 | 19768 Amazon.com The SK Hand Tools 12-Piece 1/4-Inch and 3/8-Inch Drive Tamper-Proof Torx Bit Socket Set features SK's high-polish SuperKrome finish for long life and maximum corrosion resistance. Each socket is designed with a through-hole construction to make it easier to replace worn or broken bits; simply pop the old bit out and insert a new replacement bit. Each socket has a c-clip retention groove in the hex end to provide a secure hold on the bit while in use. The bits are manufactured using high-strength S2 steel for reliable longevity, making this socket set the ideal choice for use in high-torque applications with a ratchet, T-handle, or spinner handle. With the help of an extension or universal joint, the bits can be used in awkward and tight spaces. Each socket is also individually labeled with an engraved size marker for easy reference and the entire set comes with a storage rail for easy storage.What's in the Box 1/4-inch drive T7, T8, T10, T15, T20, T25, T27, and T30 tamper-proof sockets; 3/8-inch drive T40, T45, T50, and T55 tamper-proof sockets with storage rail for entire set. From the Manufacturer 12 piece set is made in the U.S.A. Tamper-Proof 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. C-Clip retention groove in the hex end provides a secure hold on the bit while in use. Bits are manufactured to rigid standards using high strength S2 steel. These bit sockets are designed for use on tamper-resistant hex fasteners found in a variety of industrial and institutional settings. See more