The Super Max™ 8780 WS uses a sand point to draw sand directly from the container and into the 15' flexible sand pickup tube which carries the sand into the special venturi head where it is mixed with high-pressure water. The mixture exits the machine through the special round nozzle and is propelled across the surface at high speeds to remove layers of substances from the surface. The sand flow can be controlled by the proportioning valve located on the head. With a specially designed 1 1/2" width spray pattern, Daimer's wet sand blaster machines work best for spot removal of corrosion, rust, and other materials from metal surfaces.