Unfortunately, it did not fit my Sceptre monitor as it said it would, so my installation is just as flimsy as it started out to be without this mounting plate.
Somehow lost the VESA mount plate & adapter for my Monoprice Workstream monitor arm (probably because I was able to move the monitor with adapter plate attached to a different arm). Mount-It! had this part which looked like it might work with the Workstream, and when I got the package today it fit perfectly! Suspect this will also work with Fully Jarvis mounts as well, since I think that's where my 'missing' VESA adapter plate & mount went.