An Acer projector fits perfectly thanks to the spiral technique to the holder. One can imagine that the little white arms attached at one point and rotated so long and the attitude always goes in in each nest that no matter where are the holes in the picture. By the way, 15 kilos are flattered, I could do chin-ups on the bracket.
The only recommendation: Dear Take 6 dowels and screws, 8-10 mm not need and some ceilings are encountered without perfect drill heads quickly reach the limits. Ceiling Mounts shoot love to drill bits, ie drill with 4-lining, 6 nachbohren and a good piece lasts a lifetime!