0 to 360° 1/2 square Very precise tightening Essential for torque wrenches This is a tool that measures the angle of rotation made by the screw during tightening. It is positioned between the tightening sleeve and the drive square of the tightening wrench. Its principle is based on the tightening angle and not on the force, it allows for the most precise tightening, regardless of the parasitic forces (a cylinder head gasket tightened over its entire surface at the same angle will have uniform crushing). A wedging handle allows this angle wrench to be fixed, before and during tightening. The wedging rod can be fixed in any desired position thanks to its threaded wheel. Technical characteristics: • 1/2 drive square = 12.7mm.