The Snap-On Tools 4pcs Torx Socket Set includes standard sockets with a specialty system of measurement. Made in the United States, these chrome finish sockets feature a 1/4″ drive size and come in a set of 5 pieces. Specifically designed for Torx drive types, this set includes TTX 10, 15A, 20B, and 25B sockets, making it a valuable addition to any automotive tool collection for precise and efficient work. There are initials on a few of the sockets. Please refer to the pictures.