Used to mount an Epson 710ui projector. There is a handy template you can use to assist with mounting. You will absolutely need to mount this into studs with sturdy screws or lag bolts; the mount by itself is ~20 lbs. Getting the projector positioned before fastening can be tricky; make sure you have a ladder and an extra set of hands. there is enough room to place a 2-gang power/AV wallplate in between the top and bottom arms on each side (behind the plastic shrouding) for a clean install.