30? Angle Service Wrenches are made in the U.S.A. (Also referred to as Pump Wrench) A special purpose Thin Head Single End wrench with a 30 degree angled slotted opening. The thin pattern helps with use on jam nuts and in confined areas. They are generally used for servicing pumps, glands, valves, etc.30 degree Service wrenches are manufactured from steel bar. Metric sizes from 19mm through 65mm are available in Chrome finish only.