The wall brackets are top for the price. Of course, pure plastic (except screw to adjust), that does not make alzu solid impression at first glance. But once installed and bolted they sit bombproof. Screws and plugs were the same in duplicate this. Can be about 45 ° vertically and 180 ° set almost horizontal stepwise variable. Have small satellites of the devil (Concept E100) attached. The screws of the Devil stands can also be used for attachment to the wall brackets. The 3.5kg as the max. Load are given, however, I would not trust. But for small speakers around the 1kg Highly Recommended.