GreatNeck 28034 Tamper Proof Star Bit Set, 3/8-Inch Drive, 19-Piece 1/4-Inch shank: t5, t6, t7, t8, t10 x 2, t15 x 2, t20 x 2, t25, t27 and t30 5/16-Inch shank: t40, t45, t50 and t55 3/8-Inch drive 1/4-Inch hex adaptor 3/8-Inch drive 5/16-Inch hex adaptor Covered by GreatNeck limited lifetime warranty