The Package: 3 x Female Torx socket with different drives: female Torx socket with 1/4" drive: M4, M5, M6; 3/8" female torx key: M8, M9, M10, M12, M14; 1/2" female torx socket: M16, M18; 1 x Storage box for female torx socket wrench. PREMIUM MATERIALSMade of high quality chrome vanadium steel with mirror polishing, provides the highest strength and torque. CHAMFERING DESIGNEach bit head has a unique chamfer design, which makes it easier to insert the bit head into the fastener. And increase the contact surface with the binding, reduce wear, protect the binding. Applications: Work on cars, trucks, equipment, lawn mowers, machinery and other jobs requiring star/bolt fasteners. EASY STORAGE: Each set includes a sturdy blow-molded case for convenient storage when not in use. They are embossed with corresponding sizes, so you can easily identify which grip you need.