One of the best indicators of a machine that can produce quality products is automation. By taking manual steps out of the process and replacing them with automated procedures that can be finely tuned and replicated precisely, the best machines and put out consistent products with few to no defects, even at high operating speeds. The best coil lines on the market can eliminate up to 10 manual steps from a more traditional duct and fitting fabrication process. The more streamlined and automated your process is, the smaller chance there is for malfunction or error.