Extinguishers are portable devices used to put out small fires. They contain various substances, such as water, foam, or chemicals, that help smother flames. Each type of extinguisher is designed for specific fire classes, like Class A for ordinary combustibles, Class B for flammable liquids, and Class C for electrical fires. Using an extinguisher involves the PASS technique: Pull the pin, Aim the nozzle, Squeeze the handle, and Sweep from side to side. Regular maintenance and inspections are essential to ensure extinguishers are functional and ready for use in emergencies, helping to protect lives and property.