Abstract: A wrench comprising a gripping member, a handle having a complementary gripping portion at one end thereof, structure for adjusting the gripping member with respect to the gripping portion axially of the handle without rotating the handle relative to the gripping member, and structure pivotally mounting the gripping member on the adjusting structure. The gripping member may have a 60.degree. or 90.degree. included angle or may be arcuate with a gripping surface extending over substantially 180.degree.. In one modification, the structure for adjusting the gripping member is rack and gear, while in another modification, it is screw and nut.