The Bernzomatic High Heat Torch For Fast Work Times has a swirl flame, instant on/off ignition and flame lock for continuous use. This torch is pressure regulated for consistent performance when inverted. The High Heat Torch is compatible with 14.1 Oz. MAP-Pro fuel cylinders and 14.1 Oz. and 16 Oz. Propane fuel cylinders, sold separately. Works best for large diameter soldering, light brazing, woodworking and cooking.