Dowsing is the process of using a tool such as a pendulum or rod to discover things that cannot be discovered using our everyday senses. It is a term which in the past has been associated primarily with the finding of water sources.
Dowsing tools are nothing more than a communication device. In and of itself it has no power and no ability to move. Although no one knows how or why dowsing works, it seems that the movement of the pendulum or rod(s) is controlled through or by your subconscious (or something of that nature). Most experienced dowsers use all the basic dowsing tools. These are the pendulum, L-rods.