Above the wrench marked with a clear specification ,exquisite technology ,easy to use.Making jobs go faster and easier, especially in confined areas.Feature:1.Chrome Vanadium Steel2.Pressure and Erosion Resistant3.Suitable for Long Time Industrial Usage4.Anti Corrosion/Slip Surface5.Flexible rotation, mainly used in auto repair machine repair.Suitable for dismounting and installing the sanitary ware, pipe nut.Surface spray treatment. Not easy to damage the screwKindly Tips:When not in use, please gather all wrenches into the tool box for longer service life.