I use dowsing rods to find water as well as metal. Contrary to a lot of belief, it has nothing to do with witchcraft. And I have not promised my soul to the devil either. I think it has something to do with magnetism. When I graduated from high school and again when I graduated from college, my parents bought me very expensive wind up watches. Neither one of them would run a week. Every jeweler in town told me I had too much magnetism in my body. I have no trouble with quartz watches.