I have the Tiger Trak and installed it myself.
Makes a big difference on turns and on the freeways.
Stops most of the tail wag when a semi passes you as well as the turning leaning is reduced.
The one you are looking at does not attach the same as the Blue Ox Tiger Trak.
It also doesn't look as strong.
Basically secures the rear differential and frame as one.
It costs a little more but you will see the strength and weight of the materials is massive.
Best deal in town is here