B & A Treating Rods are designed for use by exterminators who must spray pesticides under concrete or wooden floors to eliminate termites and other unwanted pests. A hole is first drilled through the floor or wall and then either a side opening or end opening treating rod is inserted so that the end of the rod is exposed past the drilled hole into the soil below or void where the exterminator applies the pesticide. Made with a 1/4" NPT threaded coupling, B & A Treating Rods will fit any conventional hand-held pressure sprayer. For a single solid straight stream, use the end opening.