Abstract: The wrench comprise two levers (10,21). A jaw (15) is fixed to the one lever (10) on which a slider (17) is displaceable to adjust the mouth width. The second lever (21) is disposed at the slider (17) by means of a hinge (23). The second jaw (25) is tiltably mounted at the lever (21) by means of a hinge (24), the tilting movements being limited by two stops (26 and 27). At least one stop (27) is provided at a sliding element (29) which, responsive to the position of the second lever (21) is adapted to recede to permit, with an empty return movement of the pipe tongs a stronger tilting movement of the second jaw (25).