I installed this product with a Benq w1070, it is clear that the setting is laborious and hardware delivered was not the most judicious for my case, when I install a projector-type "best seller". I fixed the problem by buying other bolts. But for the price, once installed I am totally winning. So if you are a handyman can (learn to adapt a not optimum product to 100%), this is a very good deal, in the other case, it will turn to a much more expensive product.