I made this when I had a nut rusted to the underside of the faucet, trapping the sink (which I wanted to replace) in place. The traditional basin wrench didn't have enough leverage to break it loose. WD-40 didn't help, and there was consternation about torching it inside the cabinet like it was. It was constructed from a piece of leftover galvanized pipe, a shower valve socket wrench, and a couple of pieces of scrap rod hanging around the garage. This provided the leverage necessary to break loose the nut.
Click image for larger version.  Name: 702002_4310996051005_321979964_o.jpg  Views: 395  Size: 154.8 KB  ID: 18161