Although the grid is "only" put together and clamped in the door, it is stable when it thoroughly braced in the doorway. Downside is that - if it so thoroughly braced as intended - are to remove the grid not completely without trace. Of course, the impression is easier to remove than a hole, but the door frames made of softer wood retain a circular imprint of the rubber attachment that is also so low that sweeping alone is not enough, but that one (if the grid is no longer needed) probably First we ride grind muss.Immer better than an unstable grid or a borehole.
Conclusion: The extensions are a sensible addition to the grille, the parents and children crawling in good stead.