JMHO, but I don't trust any of them since they're made out of stamped steel. I've seen a few of them twist, and while they did not give completely out, led to the jacks going to the dump.
A much better alternative is to carry one of those small, inexpensive floor jacks; preferably aluminum.
Of course, the downside to that is sacrificing a bit of trunk space.
I sincerely wish that car makers would use a jack setup like the old VW Beetles used.
There was a square notch located near the area around the rear of the door on each side. The jack had a square fitting, was heavy duty, and one could simply plug it in, easily jack the car up while bringing both wheels off the ground if necessary, and not have to worry about the car rolling on the jack or the jack failing.