Don't know if that's an original Jackall.
I have a Jackall that I carried in my 1980 C20.
One day, I had the truck stuck in a creek bed. The rear end slid sideways and the diff was stuck with the wheels in the ruts. Used the Jackall to lift the rear end by the step bumper. Pushed the rear end over so the wheels were out of the ruts. We were miles from nowhere and no cell phones back then.
I also used it to change tires. No issues with the bumpers being bent, but it seems they were stronger back then. I would not use it on my 2010 truck.
