I’ve previously played with the Kobalt Rapid-Adjust and today I had to stop in Lowes again so I took a few pictures.
To answer one question,the jaws pop all the way open when you press the button.
I wish I would have taken a picture of it, but what worries me about it is the connection arm on top of the lever. It’s pretty tiny, yes it’s metal while the lever arm is plastic. (as well as the rest of the black case).
They also aren’t showing you the back of the wrench. There’s a big metal circle sticking out the back which I’m guessing covers a big spring coil.