This Commander Fire Extinguisher is extremely versatile and is suitable for use on Class A (combustible materials), Class B (flammable liquids) in open spaces, and Class C (flammable gases) fires, it’s for this reason they’re known as ABC extinguishers. Powder fire extinguishers smother fires by producing a thick barrier between the fuel and the source of oxygen. A powder fire extinguisher should not be used in confined spaces because the powder can be easily inhaled. Boasting PFAS free contents, consider this extinguisher for premises including garage forecourts, commercial boiler rooms and workspaces that feature welding.