Used for burning weeds, removing paint, melting ice, preheating asphalt/tar, removing road markings and preheating large castings for welding. For use with propane tanks of 20 lbs. or larger. 500,000 BTU. Complete outfit is U.L. listed. P.O.L. Excess flow "safety valve" shuts off gas flow if hose is accidently cut or burnt. Single flint striker included. 10 foot hose withstands temperatures from -104º to + 140º F. Large brass control knob on handle will not freeze in cold conditions.