The tongue and truck are raised to attach the chains. When lowered, the chains become as tight as a bar, not allowing the tongue and the truck to go down as far as they were before attaching the chains, just like any other WDH.
The Andersen lowered the front of my truck about an inch. I’m guessing here, but I weigh 165# and I hardly move the front of the truck down standing on the bumper, so I’d say the Andersen restored around 300#,
By CAT scales, it definitely put weight back on the front axle and removed weight from the rear axle of my previous truck and helped level it out. Way more than 2 pounds.