The First Alert PRO5 Rechargeable Heavy Duty Plus Fire Extinguisher is effective against the most common household fires: wood, paper, fabric, flammable liquid fires and live electrical equipment fires. The PRO5 uses a heavy duty metal head that's designed to exceed demanding needs. This heavy duty plus fire extinguisher can also be recharged by a certified professional when in use. The First Alert PRO5 Rechargeable Heavy Duty Plus Fire Extinguisher includes a heavy duty mounting bracket and strap to keep the unit secure.