If you are very new to dowsing and are not sure how it's going to work for you, you should consider the Dowsing Beginners Kit because it will give you all you need to start learning this art and science.
The Dowsing Beginners Kit consisting of one Conical pendulum and a set of L-rods:
Conical pendulum - these are the most widely used pendulums, they have an opening for a "witness". They can be used in dowsing for water and minerals, checking herbs and food, checking for underground water veins, in alternative medicine - e.g. testing blood pressure, etc.
L-rod (set of two) - these are classic divining rods. Quality construction with removable brass tips with a "witness" chamber, they allow wide range of uses, from water and mineral search through detecting irritation zones to medical and scientific diagnosis.