Metal fabrication is the process of building a structure out of metal using various processes and then assembling final pieces. Metal fabrication shops typically offer several services revolving around the raw materials. Jobs in this trade fall on every part of the process, from the design phase to hands-on fabrication work to final installation. There are many subtypes of metal fabrication which are often characterized by the type of processes they go through to reach completion, such as cutting, machining, punching, folding, stamping, welding, and shearing. Sheet metal, structural metal, and steel fabrication are also popular services in which some shops specialize.