Conform to ASME B107.4. Made from high quality chrome vanadium steel. Satin finish body with highly polished heads. Offset ends. The wrench will fit over the pipe to give a positive location on the nut. Can be used on hydraulic pipes, brake pipes etc. Contents 6 x 8, 9 x 11, 10 x 12, 13 x 14, 14 x 17 and 19 x 22mm.