Bit sockets feature high-quality, durable bits made from chrome-vanadium steel. With their rare and extreme hardness, these torx bit sockets are designed to last long and resist wear. The 12 bit socket set includes 1/4" Drive: T8, T10, T15, T20, T25, T27, T30; 3/8" drive: T40, T45, T50, T55, T60; 1/2" Drive: T70. Each torx socket size is embossed. Our tough, durable chrome-vanadium steel sockets provide superior, perfect torque for superior turning power with a mirror chrome finish for maximum resistance to corrosion. This is a complete, versatile torx socket set for professionals and enthusiasts working on cars, trucks, appliances, gardening equipment, machines and other jobs requiring star fasteners/bolts. The complete set comes in a well-constructed and sturdy plastic storage case, in which you can easily locate each torx socket and store them after use.