For drywall installations, you must mount into wall studs (typically 16 inches apart). Never mount a TV directly into drywall ...

If you’re hanging a TV on block or brick walls, you’ll need special hardware and tools to attach the mounting bracket to the ...

And no, it has not moved or sagged away from the wall after the first 10 days. Nor do I think it will. Before I hung the TV, I pulled hard down on the mounts to see if there was any give.