ABC Fire Extinguishers are very versatile. They are often the ideal choice being that they are able to put out many different types of fires. They use mono ammonium phosphate which is a dry chemical that is able to quickly put out the fire. It is a pale yellow powder that is able to put out all three classes of fire; Class A for trash, wood and paper, Class B for liquids and gases, and Class C for energized electrical sources. The dry chemical smothers the fire. It can leave a residue once the fire has been put out so keep this in mind when choosing this type of extinguisher.