General description High quality S2 steel bits with a zinc phosphate finish, available in 30mm and 75mm lengths. Hardened (58-62 HRC) and tempered for added strength, this set includes a comprehensive range of bits suitable for daily professional use. Supplied in a storage case with an inclined tray for quick and easy bit selection. Technical specifications Material: S2 steel Finish: Zinc phosphate Hardness: 58-62 HRC Bit lengths: 30mm and 75mm Drive adaptors: 3/8"Sq x 10mm Hex, 1/2"Sq x 10mm Hex Contents TRX-Star Bits: T20, T25, T30, T40, T45, T50, T55, T60 (1 each 30mm and 75mm) Security TRX-Star Bits: T20H, T25H, T30H, T40H, T45H, T50H, T55H, T60H (1 each 30mm and 75mm) Hex Bits: 4, 5, 6, 7, 8, 10, 12mm (1 each 30mm and 75mm) Ribe Bits: M5, M6, M7, M8, M9, M10, M12, M14 (1 each 30mm and 75mm) Spline Bits: M5, M6, M8, M10, M12 (1 each 30mm and 75mm) Other information Lifetime guarantee*