I was a little skeptical at first and they cost a little more, but man are they easy to use and effective. Made by RV'ers and in the USA. go ahead spend a few more bucks and be happy.
I made my own out of 2x4s and threaded rods.They are for the easy tow wide spread axles. Saved $150 and they help!
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Ed & Ruthann / Toby and Tucker
2014 GMC Sierra Crewcab 2500 Duramax
2014 Wildcat 327ck