I use this to loosen and tighten the bolts on my weight distributing hitch for our travel trailer. The specifications call for the bolts to be torqued to 200 foot pounds. Once tightened and torqued, then used for a few thousand miles, the bolts are tight! A simple 18" breaker bar is too short to get any real leverage. This breaker bar was perfect for both loosening and the re-tightening those bolts.
Although product is "Made in China" I had no problem cranking down pressure for my automotive purposes. The price fooled me and didn't expect much, also comes with lifetime warranty