The single roll former machine typically consists of a series of rollers that are strategically arranged to form metal strips into desired shapes. The process begins with a flat strip of metal, usually made of steel, aluminum, or galvanized sheet. As the metal strip passes through the rollers, it is incrementally bent into the desired profile. The design of the rollers is critical; each roller alters the shape just slightly, allowing for a smooth transition to the final form without risking damage to the material.