Two Different Installation Conditions You could make this projector mount in two different conditions - ceiling mounting or wall mounting. That could meet your different needs ^^ High-quality materials Solid Construction made entirely of high grade steel, supporting projectors up to 30 lbs ^^ Height Adjustment The telescopic height adjustment system raises the projector from 16.9" to 25.6" from the ceiling, and the screw installation ensures that the proyector will not shifted ^^ Easy to Install Pre-assembled, this projection mount can be set up in a few steps with quick release hooks that attach and detach by tightening and loosening mounting bolts ^^ Fully Adjustable 15-degree tilt, 15-degree swivel, and 360-degree rotation, hitting all the right viewing angles