High Heat Torch For Fast Work Times, Designed For A Wide Range Of Jobs Including Soldering Large Diameter Copper Pipes, Brazing & Heat Treating, The Optimized Swirl Flame Burns Hot & Efficiently For Maximum Heat Output & Fast Soldering Times, The Auto Start/Stop Ignition Lights & Extinguishes With The Push Of A Button, While A Run-Lock Button Keeps The Torch Lit For Continuous Use.