The BHA-1000-L Agitators were designed to fit through the bung hole on a drum cover. The BHA-1000-L is designed for the large bung. This agitator uses an auger – style blade which will move material from the bottom of the drum to the top. It does this very efficiently and quickly. This agitator uses a 1/2 horsepower air motor. The BHA Agitator is the most efficient bung agitator in the industry and will also mix viscous fluids.