Adjustable L-Rod is a great L-Rod for more advanced dowsers due to its extreme sensitivity. It is sold as set of two rods.
Adjustable L-Rod can be adjusted by moving the length of the rod in relation to the handle. The handle has a screw on the top, which allows the rod to be moved to different lengths balanced on either side of the handle (the handle acts like a fulcrum).
This very useful dowsing rod can be used separately as a one rod or as a set of two similarly to original L-Rod.