Have I checked and weighed, which hook I use for our concrete pavement many recessions. Installation was easy. Due to a non-optimal drilling hold only 3 of 4 screws. However, contrary to other recessions I can not say that this will be a problem. 120 kg holding the thing that way. Even criticism of the screws, dowels or louder noise transmission through the ceiling I can confirm at all. - The hook holds and I have great confidence that it stays that way. :-) Top!