..hollow metal tubes, sometimes bent at a certain angle. Two tubes (fuel/oxidizer) go through the torch, the two aforementioned substances are blended, then the mix is ignited and the flame appears right at the end-part of a torch. The heat level that is created is high enough to melt metals, which is essentially the concept of welding - merging two objects together by melting their surfaces. Cutters work in a similar way - they create a localized source of temperature high enough to melt through steel, separating parts of an object by "melting" them away. Plasma cutters use an ionized stream of gas to cut through metals in a similar manner. We offer a great selection of welding & cutting torches. Shop with Mega Depot!