Two brake levers: the top one is a Drags repro and very nice it is too; the bottom one is the original one from my bike, which has a fully round hole for the brake rod. This obviously allows the brake rod to spin when you are trying to adjust the brake, which is irritating.
This hole should not supposed to be round...
This is a very dodgy picture, nicely illustrating the problem of focusing on small subjects while confusing the auto-focus with a confusion of adjacent objects. It shows the brake rod with a small weld, partially closing the hole on each side. I use MIG wire as a filler for jobs like this.
After welding, I filed the hole back to shape to fit the brake rod. Here it is in place:
Job done. Now I can adjust the brake easily.