A Flattener is essential to coil processing. It is on the front end of a tube mill, pipe mill, spiral pipe mill, press, rollforming line, slitting line, or cut to length line to flatten the material before it is further processed. A coil flattener usually consists of three, five, or seven rolls. Material is flattened by removing stress from the material as it passes through each roll. Material is pressed from the top and bottom rolls until it is flat enough to process through the rest of the line. A flattener is different from a precision leveler because it usually only flattens the coil enough to be processed by removing cross bow or coil set. A precision leveler will achieve a more uniform “flatness” since they apply more pressure on the material with more rolls to remove more of the material’s stress.