Craftsman 7 pc. Torx Bit Socket Set, 1/4 and 3/8 in. Drive Sizes: - Three 1/4" Drives: T15, T20, T25 - Four 3/8" Drives: T30, T40, T45, T50 Material: Chrome Vanadium Steel Drive Size: 1/4 & 3/8 in. Drive Number of Pieces: 7 pc.