I'd been looking for a torque multiplier, & ran across this review.
I underlined the part I like.
I purchased this to aid in removing a gland nut from a flywheel and to have another useful tool in the garage. The nut was torqued to 275 lbs when installed, but as soon as I applied some force with the multiplier via a small breaker bar, I noticed something giving while the nut stayed put. I stopped and looked to find the little 1/2" male to male adapter twisted 45 degrees. I will allow some room to say that the nut might be a little tighter than 275 lbs, but beyond 500 lbs? No way. I like the idea of this relatively cheap tool, but just expect a little creativity to keep it functioning. I just had to chain a few 3/4 to 1/2 impact adapters to make it work. The review posted a few days earlier was spot on, so I'm not going to regurgitate what they said.
Maybe the tool comes short of expectations, but it works great to just carry around the garage while wearing a tight white shirt. I have found that it improves my attractiveness 5X. Now my wife's pregnant again. Thanks Ratchet Helper.