Klein screwdrivers are proudly made in the USA from the highest quality tempered steel, carefully heat-treated for maximum strength providing confidence and convenience. Durable black oxide tips are forged and precision ground to fit screw openings securely, resisting slippage. 10-Fold Screwdriver / Nut Driver, Tamperproof TORX® Contains 5/16-Inch & 1/4-Inch nut drivers, T7, T8, T9, T10, T15, T20, T25, T27 TORX