if you want to mount you new Optoma hd20 , this be a perfect ceiling mount . it be very simple . attach mount plate and adjustable clamp to bottom of projector - Mount the ceiling bracket with 2 include screw -lrb- wood screw and drywall screw include -rrb- , then connect the two and tighten to proper position . I can not believe I consider buy a mount in the store for $ 70 - $ 150 . this mount for $ 19 be perfect . I could not be happier .