Will it fit for my projector ? 1. Please check your ceilling wall, is it concrete wall or regular wall ? The projector mount should only be installed on concrete or brick wall with provided screws. The Ceiling plate dimensions: 3.1 inches x 3.1 inches (square), make sure your wall could be installed. 2. The weight of your display should be less than 66lbs. 3. For projectors with 4, 5 or above mounting holes on the top. Please measure the maximal diagonal distance of any 2 holes of all mounting holes on the top of the projector; it should less than 14.2 inch, more than 9inch /230mm. 4. For projectors with 3 mounting holes on the top. Please measure the maximal distance of any 2 holes on the top of the projector; it should less than 14.2 inch, more than 9 in/230mm.