I actually had a different use in mind for these bars. I use them upside down and have attached them to the rigging points on top of my Yamaha dsr 15 speakers with a 12mm ( I think ) bolt. I then cut a short piece of old speaker stand tube, the 35mm stuff, and put it in the hole, and used this to support a t bar with four lightweight pars on it. It?s great for when you are on a little stage and can?t squeeze another set of stands in. If you don?t have your cabs too high, the whole thing is remarkably stable and not dangerous at all. You can also link two of these together with pipe and use them on top of a speaker with a couple of light fittings as intended.