I have used bending to make a tension wrench that has a wider footprint.
I have bent laterally to a slight degree on some of them so that the bend is in the wide side and it widens the footprint.
to do this you need to bend the material between two locking pliers, with the thin edges of the material set in the slots in the jaw of
the plier that are made for gripping pipe or larger round objects.
these slots hold the material to prevent slipping during the bend. the two pliers should be about an inch apart then the slight bend it made and the tension wrench is then made out of the material. its best to start with the bend rather than try to bend a wrench that is already formed, as there is more room to clamp pliers before the final shaping.
lately I have just been bending tensors along the thin aspect of the material so that it simply makes it wavy and thus can be wedged into the plug
the wavy aspect of the tensor blade is equal to a thicker footprint. and will keep a tensor from slipping down in a wide bottom keyway.