I love the Doughty products but they are just so darn expensive.
Next choice, these.
Nicely finished, come with matching bolt set. Nice size wing nut (actually why I chose this style). TUV rated. I've bought a few now for hanging LED movers and smoke/haze machines, because I can afford to use two per unit which I wouldn't if I bought the Doughty ones (sorry Doughty).