They are *slightly* offset, so they are semi versatile in that regard.
The cables being welded to the nut save weight and make the piece more streamline. Very small, but not as small as the #0 HB brass offset. They are also very strong in good rock.
-Mine rusted on me in just one day of climbing on the coast. No contact with saltwater, just the air.
-Not great in soft rock, in that case go with a brass nut