Coil breaks are a defective condition composed of ridges or marks across the width of sheet or coil caused by improper coiling or leveling. Creases or ridges which appear as parallel lines, transverse to the direction of rolling, and which generally extend across the width of the sheet. A discontinuous curvature in the strip in the direction in which the material was rolled or uncoiled. Coil breaks are generally found in uncoiled hot rolled strip.