Sealey Premier Impact TRX-Star*/Hex/Spline Bit Set 3/8"" & 1/2""Sq D --High quality impact grade S2 steel satin finish 36mm length bits. --Specially heat treated CNC machined tips reduce stress and prevent cam-out under load. --Torsion bits absorb impact and transfer maximum torque to the fixing. --Hardened (58-62 HRC) and tempered for added strength. --Colour-coded for fast identification. --Contents: TRX-Star* Bits; T10, T15, T20, T25, T27, T30, T40, T45, T50, T55, T60, Hex Bits; 4, 5, 6, 7, 8, 10, 12mm, Spline Bits; M5, M6, M8, M10, M12, M14, M16, M18, Drive Adaptors; 3/8""Sq x 10mm Hex, 1/2""Sq x 10mm Hex. --Supplied in storage case. --Lifetime guarantee*. --Model No. AK21902 Weight0.76kg High quality impact grade S2 steel satin finish 36mm length bits. Specially heat treated CNC machined tips reduce stress and prevent cam-out under load. Torsion bits absorb impact and transfer maximum torque to the fixing. Hardened (58-62 HRC) and tempered for added strength.