I have a hard time explaining to people as well, and usually just call it a "split panhard bar." Occasionally that will click, but few folks really get it until they see it.I was explaining a Watts link to a guy at a car show this weekend. His panhard bar was at enough of an angle, that when he laid frame, the left dually hit the fender. I deducted for that in judging.
Separately, putting together this rear torque arm and watts link should drive most people to adapt an IRS cradle.
David