The socket wrench sets are made of high-quality, durable S2 alloy steel and chrome vanadium steel bits. With their exceptional hardness, these socket bits are designed for long life and wear resistance. The 12-bit socket wrench 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 robust and durable chrome vanadium steel sockets provide superior torque and are perfect for high-speed applications with a mirror-polished chrome finish for maximum corrosion resistance. This is a complete, versatile Torx socket wrench set for professionals and hobbyists working on cars, trucks, household appliances, garden equipment, machinery, and other jobs requiring star-shaped fasteners/bolts. The complete set comes in a well-constructed and robust plastic storage box where you can easily find each socket and store it after use.