When working with sheet metal, the term "gauge" is often used. Gague are used to specify the thickness of a metal sheet. Gague (Ga.) is a length measurement unit for diameters originating in North America and belongs to the Browne & Sharpe metering system.Cold Rolled Steel Flat Sheet is a thin, flat piece of cold rolled steel with many applications. It is measured by its thickness (gauge). It has a smoother finish and a tendency to be not as hard as hot rolled steel sheet. Often used in general fabrication where finish is important.

Cold Rolled A36 Mild Steel P&O Sheet Metal: Cold rolled mild steel is very similar in use to Hot rolled mild steel. However, due to lack of scale and the Pickled & Oiled (P&O) surface, it has a cleaner appearance. This is the product most people associate with raw steel sheet metal, because Cold Rolled sheets are typically thinner gauge steel.