This Draper security screwdriver set has been manufactured from chrome vanadium steel, hardened and tempered with a shot blast finish. Each bit in this set 1/4\'\' soft grip driver. Completing this set, is a heavy duty storage case with plastic inlay to hold items safely and securely. Includes: Magnetic soft grip driver 3 x Tri wing: 1, 2 and 3 4 x Spanner: 4, 6, 8 and 10 5 x Spline: M4, M5, M6, M8 and M10 4 x Square: S0, S1, S2 and S3 6 x Security hex (metric): 2, 2.5, 3, 4, 5 and 6mm 6 x Security hex (imperial): 5/32, 9/64, 1/8, 7/16, 3/32 and 5/64\" 7 x Draper TX-STAR®: T5, T6, T7, T8, T10, T15 and T20 9 x Draper TX-STAR® security: T8T, T9T, T10T, T15T, T20T, T25T, T27T, T30T and T40T