this sets sizes are 3 mm and 1/8″,5/32″,3/16″,7/32″,1/4″,5/16″,1/2″,9/16″ and-5/8″The Proto Professional Hex Socket Set includes 10 pieces ranging in size from 1/8″ to 5/8″ and a 3mm socket. Made by the renowned brand Proto in the United States, these sockets are designed for use with 1/4″, 3/8″, and 1/2″ drive sizes. The set features a chrome surface finish and includes both 1/4″ and 3mm hex allen sockets, making it a versatile and essential tool for automotive and industrial applications. With no warranty mentioned, this high-quality socket set is a reliable choice for professionals and automotive enthusiasts alike. Impt……most of these sockets have never been used!!! this is a hell of a deal