Chrome Vanadium 6150 hex drive bits, each size in 30 and 75mm lengths. Set includes 3/8" and 1/2"Sq drive to 10mm hex Chrome Vanadium steel adaptors. Supplied in storage case with inclined trays for quick and easy bit selection. Contents: Ribe Bits: M5, M6, M7, M8, M10, M12, M14 (1 each 30 & 75mm) Spline Bits: M5, M6, M8, M10, M12 (1 each 30 & 75mm) Hex Bits: 4, 5, 6, 7, 8, 10, 12mm (1 each 30 & 75mm) Security TRX-Star Bits: T20H, T25H, T30H, T40H, T45H, T50H, T55H, T60H (1 each 30 & 75mm) Drive Adaptors: 3/8"Sq x 10mm Hex, 1/2"Sq x 10mm Hex.