If your cutting through thorbecks chrome tank legs you might want to use a coated blade to get through all the rust and shitty chrome. The fasted way to cut through an air tank leg by far is to use some 3M rubing compound and a lint free cloth. Just start rubbing and when it gets hot, thats when youl know its working. Sorry everyone on here is a bunch of assholes were all just unhappy with our lives.