Adjustment ball for rear view mirror hanger

IF just tightening the little pressure plate on the inside of the mount does not tighten it up then you have 2 more options, I have used a small piece of sandpaper between the ball and the little pressure plate behind it and it worked for me. After I did that I saw someone here recommend removing the little pressure plate piece and place it flat on some smooth concrete with the dimple side facing up, give it a light tap with a hammer to "flatten the dimple" just a tiny bit then test fit. Repeat as needed, it really shouldn't take much force to change the shape