40pc TRX Star / Hex Key / Spline Socket Bit Set3/8" and 1/2" Square Drive KitChrome Vanadium steel bits hardened 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 caseFeatures: Chrome Vanadium steel bits. Hardened and tempered for added strength. Set includes 3/8" and 1/2"Sq drive to 10mm hex Chrome Vanadium steel bit adaptors. Contents: TRX-Star Bits; T20, T25, T30, T40, T45, T50, T55 (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. Supplied in storage case. Lifetime guarantee . Specification: Contents -TRX-Star Bits; T20, T25, T30, T40, T45, T50, T55, (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 -1.45kg Further Information We sell a wide variety of tools and workshop equipment for both the DIY and Professional markets. Alias: ys07306 Loops 40pc TRX Star / Hex Key / Spline Socket Bit Set - 3/8" & 1/2" Square Drive Kit