Conform to: ASME B107.4 & ANSI B107.6. Made from chrome vanadium steel with a highly polished mirror finish. Made to American Federal Standards, giving higher torque therefore improved performance. The wrench will fit over the pipe to give a positive location on the nut. Can be used on hydraulic pipes, brake pipes etc. | Chrome plated finish to pevent from corosion. | 15? Head angle