There is also the UX plugs also each in longer versions than the usual normal anchor long is always advantageous if the wall does not bear right because the plaster layer is applied too thick, or you have wallpaper work through several layers, until you reach the actual load-bearing wall meets.
By the sawtooth the anchor is firmly plugged into the wall is also expressed without border not so easy in the depth of the hole into it and also does not rotate with in any case, when the screw is screwed. Especially with a crumbly wall where the hole faster half an number is too big to be suitable as this anchor is the right choice. The anchor also summarizes very well the further the screw is driven into it and you have to have not worry that the anchor will not hold, perhaps even rotates with, or even disappear into the wall.
I am now completely switched to these plugs in different sizes and lengths and am even in tricky installations not been disappointed so far. The Fischer anchors are usually always a little more expensive, but again, just take a price comparison, but the UX plugs are a strong buy recommendation.