This is a 9-piece Torx socket set with drive sizes of 1/4", 3/8", and 1/2", all made in the USA by LISLE-PLEWS. The set includes sockets in the standard socket type and specialty system of measurement. The sockets are designed for use with a 3/8" drive type and are suitable for various automotive applications. This high-quality set is ideal for professionals or DIY enthusiasts looking to tackle tasks requiring Torx sockets with precision and reliability.