I'm trying to buy a jack for my RV I'm looking at a pair of jacks you have and they're called leveling jacks? Are they the same as a jack to lift for changing a tire, for instance? Or are they only for leveling? I can't seem to find the information. For the purpose of this text message I'm only asking you for terminology. No need to inform me about a product in particular as Im only asking terminology. Pease inform thank you
