Combustible Metals Class D specifically designed for use on combustible metal fires, this extinguisher features a discharge assembly that keeps the operator at a safe distance while providing accurate application of the agent on the fire. From the heat of the fire, the sodium chloride based agent forms a crust to exclude air from the burning material. Suitable for use on Class D fires such as those involving magnesium, sodium, potassium and sodium-potassium alloys. There is data showing that zirconium, uranium, titanium, and powdered aluminum fires can be controlled and extinguished with this unique extinguisher. Typical Uses: Metal production and machining operations.