I was remodeling my bathroom and installed a copper shower system with 2 shower heads, 4 body jets and a diverter along with a mixer valve. I can't count all the joints I had to sweat, but there were a lot. This tool attaches to a drill and makes it 100 times easier to clean fittings inside and outside of copper tubing. I couldn't imagine doing everything by hand, I would get arthritis if I tried. This tool was a real life saver, I took the advice of another reviewer who suggested attaching aβ¦