Very cheap. This is not ideal for my acer 5360 but I turned the 3 arms and it does it well. There bcp has screws with M3 but not for x20 acer. I had to modify the base that attaches to the ceiling in order to cross the power supply and HDMI cable in the tube, and not as a side carrier provides. (It's much cleaner). Setting not obvious at all, but it is done for any good faith ....
