Strange world we live in, I just posted about these in another thread.
I live close by and collected a set today, they really work very very well. The guy said they are very very very.....similar to the Yamaha ones and come with well nuts,but I used my own nut and bolt to give a more secure mount.
Got these fitted to my bike and I am very pleased with them. They also do their version of the Yamaha tall touring screen which I haven’t tried but I am told it is very good indeed.