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Start at an end of the piece to be cut and heat until it is cherry red. Once it starts to liquefy, press the burst valve lever and make your cut. Move as fast as the torch will allow a clean cut to keep the heat of the flame confined to a small area. If you move too slowly, you could heat the area around the cut so much that it will also liquefy. When this happens, it can become elastic enough that the metal will close back up behind the torch. View Related Article
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