I used it in my RV to combine 2 battery cables before going to inverter/charger. And one of the posts just broke while I was tightening the nut. I noticed lower resistance is I was spinning the wrench, and the post jut came off. Fortunately I only needed 3 posts. Unfortunately this was the last post that I attached cables to, so at that point busbar was already screwed on to the body with other cables in place.
I decided to leave it alone for now. But would certainly replace later on after getting REAL heavy duty busbar.