Neiko 10120A Tamper Proof Cr-V Torx Bit Socket Set, 15 Piece Ultra-strong and durable drop forged Chrome-vanadium steel for long service-life Impact bits for use with Air tools and impact wrenches 3/8" drive: T40, T45, T47, T50, T55 and T60 1/4" drive: T10, T15, T20, T25, T27 and T30 3/8" x 1/4" adapter