Those are NOT leveling jacks.
They are stabilizing jacks ONLY.
Do not use them for leveling.
You need to level side to side, by blocks or wedges under the wheels. Then front to back with the tongue jack.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package