This 7-piece adaptor and universal joint set from Hilka is designed for socket drive conversion. The set includes four adaptors: F1/4 - M3/8, F3/8 - M1/4, F1/2 - M3/8, and F3/8 - M1/2. It also features three universal joints with 1/4", 3/8", and 1/2" drive sizes. The tools are made from chrome vanadium with a satin finish and are suitable for many applications. The total weight of the set is 0.53kg.