Abstract: A wrench head or the like device for applying torque about an axis to a b head or the like element from which there extends axially a member such as a tube or cable. The device has a pair of jaws spaced and configured so as to oppositely engage the element and provide a gap between distal ends of the jaws. The jaws have axially opposite regions, and the device is characterized by a reinforcement extending across and fixed to an axially aligned pair of these regions. The reinforcement terminates at the radially outward sides of the jaws and is relatively thin axially so that the device is receivable in a space limited axially and radially of the element. The reinforcement has a opening extending radially from the gap for passage of the member to align the device axially with the element.