I bought this for my new mount Beamer. I have not used for ceiling mounting, but they bolted to a table. The stability is ensured even at full height. The processing of the bracket is very good, there were no optical defects. Supplied with screws are included for all types of projectors. For mounting an additional screw is required. Although I like the rating shows'm very pleased with this support, I would like to enumerate for other buyers the things that I think is worth mentioning: 1) The holder has an internal cable channel. If the bracket up, the cable without partial disassembly may not be withdrawn. 2) The holder has (as in the picture) four movable support points. Two are short, two long, two more Long are included. If the recordings of the projector are close together, the Langen have to be sawed off if necessary. For me it was enough just after several attempts. For projectors with 3 shots an arm may incidentally be completely unscrewed. 3) Important: all support points are at the same level. If the recordings of the projector so are at different levels, spacers are needed which, if necessary, the stability would be affected. 4) The holder can be tilted in both directions and is fixed by screws. An exact positioning is therefore quite difficult, because the position changes slightly with every tightening. A second person is recommended here. In summary, price is good, quality is good, as long as the above points are not disturbing, I give a strong buy recommendation.
