For their price, they are good. The screw for the counterweight is M6. For the M8 screw I have, I widened the holes of the counterweight, the handguard, and the outer washer, which is made of aluminum like the counterweight. It's not something difficult.

They were installed on TDM900 (with a little trimming on the lower plastic because it touched the tank when the steering was fully turned)

It is of quite good quality thin plastic, with very strong LEDs! The flash is so strong that I am thinking of getting rid of the regular flashes. However, when the lights are on, the white light is visible from the inside of the handle at some points. It definitely needs to be covered with something at those points, because it becomes annoying when driving at night. And I have a concern about how well the mounting mechanism will withstand vibrations. If I don't come back with another review, all is well haha

EDIT: After using it for about 4000km, in a good pothole at 120, we had a handlebar break. It broke at the point where it screws onto the handlebar. And the plastic seemed a bit thin from the beginning, I don't know what I was expecting. I glued it with two-component glue and as long as it holds..

They are very good. They are simple plastic without a metal base (many factory handles are like this, for example, Vstrom 650). The turn signals are very nice, fast, and have strong illumination! The installation is easy and the cables are long enough. I don't give it 5 stars because for their initial price, they are a bit expensive, but for that money, there are no handles with turn signals and daytime running lights. The handlebars are made of metal.