I am not certain what material the ball is made of. The listing says silver stainless steel. If it is, it is quite thin. It feels more like a coating on a Christmas Tree ball.
amazon.com link »
One of the comments from a customer says it is "Polished stainless steel very durable and survived a Boston winter with no harm."
I guess that is encouraging so that I can safely drill it.
I was thinking of trying to drill a hole big enough to get a toggle bolt (wing nut) into it. If it really is metal, I should be able to do that. It would be nice to have a screw long enough to go through a piece of wood attached inside the backbox.
I am not too thrilled with the idea of glueing anything to it. Not sure it would stick on the shiny surface, but I could rough it up.
Whatever was in there originally to hold the ball had three screws in the side of the hole in the top.
Quoted from YeOldPinPlayer:
Make sure you get a metal gazing ball. I bought some to use as trophies and one of them had a big crease in it. Didn't matter for my application. I drilled holes in it and used wall anchors to secure it to a wooden base so it wouldn't roll away.
Are these the standard drywall anchor screws with a plastic sleeve that one inserts into drywall? I was wondering how well that would work on this ball. If it really is metal, it might work. I don't want the crease to extend too far from the bottom and be visible outside the backbox.