Torx sockets, star sockets or e torx sockets are sockets that have 6-point star internal head shape designed to fit over the top of torx head screws or bolts to either loosen or tighten them. Torx sockets are available in a wide range of sizes indicated with the letter 'E' followed by a number such as E10, E20 etc. Torx sockets are used in a wide range of industries including automotive repairs and electronics.