Sheet metal is a type of metal that is formed into thin, flat pieces. It is often used in construction and manufacturing for a variety of purposes. Two common types of sheet metal are FOIL and tole. FOIL is a thin sheet of metal that is usually made from aluminum or copper and is used for insulation, packaging, and other applications. Tole is a thicker sheet of metal that is typically made from steel and is used for roofing, siding, and other structural components.