There are many very successful dowsing systems and methods, with or without tools. But as a general rule, most dowsers usually use one of the four most popular types, which are the Pendulum, L Rods, Y Rod, and Bobber. You will also find unlimited variations in the shapes, sizes, materials and how they are used. This variety does not seem to affect their work ability, other than speed, agility or convenience. Many dowsers have a whole pile of dowsing tools that they have collected or made. These tools generally fit into one or some combination of the above. Your choices should be determined by what tools feel and work good for you.
The following is a synopsis of the basic instruments commonly used for dowsing.