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. Supplied in storage case. Features & Benefits:Part of the Siegen by Sealey range of quality tools at competitive prices.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*.Model No. S0982 Specifications: Model No S0982 Brand: Siegen Contents: TRX-Star* Bits; T20, T25, T30, T40, T45, T50, T55, (1 each 30 & 75mm), Hex Bits; 4, 5, 6, 7, 8, 10, 12mm (1 each 30 & 75mm), Spline Bits; M5, M6, M8, M10, M12 (1 each 30 & 75mm), Drive Adap