Well, there are 4 main types of fire extinguishers – water, dry powder,foam, CO2 and wet chemical. If flames break out in your home, office, or other building with ordinary combustible products, flammable liquids, and electrical wiring, a multipurpose ABC fire extinguisher(dry powder) is the proper tool to douse the blaze. For cooking fires in commercial kitchens, a Class K extinguisher is needed to put out the fire and prevent it from reflashing. Class D extinguishers are less common and are only used to fight fires that break out in chemical plants and industrial facilities with combustible metals onsite, such as sodium, potassium, titanium, and magnesium.