I am trying to remove the rear double axle nuts from the differential side of my honda fourtrax 300 4×4. I have the 41mm wrenches and even with another person I am unable to budge the nuts loose. I have repeatedly soaked the nuts in marvel mystery oil and still they will not budge. Just confirming that the nuts loosen counterclockwise? (Not a left hand thread )

Thinking about ordering one of these axle nut tools for an impact. Anyone have any experience with this tool?
Honda ATV Axle Nut Tool R R Exposed Axle Nuts | eBay

Thanks in Advance,