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This mount does the job but the ball joint does not stay in place and moves even when tight. I even snapped a wing off while trying to make it tighter. It works fine if you glue the ball in place with liquid nail.
I got these to mount my Logitech G906 speakers. The actual mounts are nice. The included plastic wall inserts for the screws to go into are garbage. They have no provision to prevent them from being pushed into the wall. Other then that, they are very nice! I recommend them, however, get some good screw mounts.