The folding balcony table is 49.99 euros instead of 72.54 euros on Cdiscount. This table attaches to the balcony railing, or to the frame of a window, and also has a foot which rests against the wall, thus providing three points of support.
The table shelf is stable, and can then be folded down to be stored along the railing or along the wall if you have attached the table to a window frame. When you do not need it, the table thus occupies almost no space. It is made of steel: it can therefore stay outside and resist bad weather.