Suggest the 1/2 ton model as Richard pointed out earlier two can be used to change a slide seal....https://newellgurus.com/showthread.php?tid=5737&pid=47224#pid47224
I would only need one. My coach has no slides. On the other hand, I really don't want to have to store another tool. Maybe my 3 ton floor jack can take the frontal load off while I pull the genny out far enough.
I bought the 1/2 ton model. Worked great.