42pc TRX-Star / Hex / Spline Socket Bit Set3/8" and 1/2" Square Drive MechanicChrome Vanadium 6150 steel bits hardened to 52-53 HRC and tempered for added strength. Set includes 3/8" and 1/2"Sq drive to 10mm hex Chrome Vanadium steel bit adaptors. Supplied in storage case with inclined tray for quick and easy bit selectionFeatures: Manufactured from Chrome Vanadium steel. Long and short TRX-Star , spline and hex bits. Includes 3/8" and 1/2"Sq drive to 10mm hex Chrome Vanadium steel bit adaptors. Convenient high-impact storage case presents bits at an angle for easy selection. Contents: TRX-Star Bits; T20, T25, T30, T40, T45, T50, T55, T60 (1 each 30 and 75mm), Hex Bits; 4, 5, 6, 7, 8, 10, 12mm (1 each 30 and 75mm), Spline Bits; M5, M6, M8, M10, M12 (1 each 30 and 75mm), Drive Adaptors; 3/8"Sq x 10mm Hex, 1/2"Sq x 10mm Hex. Lifetime guarantee . Specification: Contents -TRX-Star Bits; T20, T25, T30, T40, T45, T50, T55, T60 (1 each 30 and 75mm), Hex Bits; 4, 5, 6, 7, 8, 10, 12mm (1 each 30 and 75mm), Spline Bits; M5, M6, M8, M10, M12 (1 each 30 and 75mm), Drive Adaptors; 3/8"Sq x 10mm Hex, 1/2"Sq x 10mm Hex Drive -3/8" and 1/2"Sq Net Weight -1.77kg Further Information We sell a wide variety of tools and workshop equipment for both the DIY and Professional markets. Alias: ys00697 Loops 42pc TRX-Star / Hex / Spline Socket Bit Set - 3/8" & 1/2" Square Drive Mechanic