In principle, the Tubenquetscher works pretty well, the two sides are pin but still the squeezer metal is quite easily bendable. In addition, the tube can be easily damaged by sharp-edged rotary member. For these reasons, one should note the following points unbedilngt when using the squeezer: the Tubenquetscher not use for full tubes so that Verbiegungsgefahr is excluded. The tube should not be clamped to the edge of beyond, so the walls are not damaged by the squeezer.
