Tonfa

A consists of a stick with a perpendicular handle attached a third of the way down the length of the stick. Tonfa are may be used to strike, jab, block, and bludgeon. Because of their design and application, Tonfa are most skillfully wielded by those already highly proficient in close-range combat.

Dowsing Rods
Dowsing is a technique where one uses a pair of simple L-shaped rods. One rod is held in each hand, with the short arm of the L held upright, and the long arm pointing forward. The practitioner then concentrate hard on what they're looking for, and the rods react when they're getting close to it. Dowsing is most often used for finding water. Momiji's ancestors had been practicing the technique for decades.

Ruiga used his tonfa as dowsing rods, which he could use to find water for his water technique.