A lip-rolling and flanging tool for bending back and/or widening fender-wheelwell edges of motor vehicles, the tool having a flanging roll (46) that is attached through a telescoping tube arrangement (10) to an affixing flange (4) mountable on a wheel axle of the motor vehicle, and while generating a pressing force against the fender-wheelwell edge is pivotable together with the wheel axle, the flanging roll (46) is mounted in a forked support bracket (44) disposed at one end of the telescoping tube arrangement (10), which bracket is disposed in a rotatable and lockable manner between the clamping jaws (40, 40′) attached to the telescoping tube arrangement (10′), the clamping jaws (40, 40′) each have at least one recess or milled-out section (100,100′) that interacts with a pin (103) disposed in the flanging-roll support bracket (44) so as to restrict the pivoting range of the flanging-roll support bracket (44).