they are a 1" bar, they have an offset hex, that is when you lay them side by side you have one end with the hex flat and the other end will sit up on the sharp of the hex.
Maybe they don't have a preset to them, as far as i can tell if they do have this preset, one bar is twisted more than the other. it's hard to tell as there is no line across the hex.
i shall get back with some pic's so you can see what i'm trying to explane.
Thanks for the help on this guys.