I bought this to mount a Benq HT3550 projector which has a large protruding area at the bottom. Because of this I had to use spacers which of course didn't exist although I wasn't expecting them, but other than that it's a really decent mount for the low price. I read many reviews before purchasing. Some struggled to hold their positions. I haven't had this problem, but for those who do, I suggest centering the mount on the projector's center of mass when installing the part that screws into the projector. Most projectors indicate the center of gravity with a crosshair or indicate it in some way. If you are installing the HT3550 you will also need 6mm standoffs and 14mm M4 screws. I couldn't find spacers locally so I 3D printed my own but spacers around 6-7mm will fit.
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