The set includes 15 pieces of 3/8 inch drive Metric long torx socket, which comprises T10, T15, T20, T25, T27, T30, T40, T45, T47, T50, T55, T60, Universal Joint x 1, 1/2" to 3/8" adapter x 1, and 1/4" to 3/8" adapter. The torx set head is made of S2 alloy steel, a strong and tough material that resists breaking, wearing, and corrosion. It is also durable and exceeds ANSI standards. The socket bit set is made of heat-treated CR-V steel that increases the hardness and torque of the set. The surface is mirror chrome plated, and the E-Torx Sockets have manganese phosphate coating that protects it from corrosion and rust better than Black oxide coating. This extends the service life of the set. The extra-long star socket set makes it easy to reach fasteners in the deepest and tightest spots, making it more convenient to use in narrow spaces. It also saves money on the extension bar. ProductSiteLaunchDate : 2014-10-12T17:51:34.542Z Size : 24mm StreetDate : 2017-03-12T00:00:01Z Style : Drive: 5.0 inches (12.7 mm) SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnitCount : 1