Is is possible to remove this damper? It looks like there are special kind of screws about an inch above but I'm not sure how those would come out. If I can't be remove could it be cut out? I have an oscillating tool so I thought maybe there would be an attachment made for HVAC.
Those are rivets and you normally have to drill or grind them out. You can probably get in there with a rotary tool like a Dremel with a grinding wheel on it. If not, get a hack saw and just cut the bracket on each side to remove the internal parts and leave the rivets there. Is there a particular reason you want to remove it?