This Streetwize Bit Set is made from high-strength chrome vanadium steel, this 40-piece set contains Torx, Hex and Spline bits which are suitable for a range of purposes. Each bit is available in both 30mm and 75mm in length. Ideal for use in home, on the move or in the garage. The set also includes both 3/8” & 1/2” socket adaptors that are compatible with any 3/8” & 1/2” ratchet or screwdriver handle.Supplied in metal case. Set includesOne 3/8” socket adapterOne 1/2” socket adaptorMade from chrome vanadium steelTorx, Hex and Spline bits suitable for all purposes in 30mm & 75mm lengthsHardened adaptor tips for strength and durability