Sheet metal is a kind of integrated metal cold working technology for metal sheet (usually in under 6mm), usually the parts plastically deformed by handwork or stamping die to form your desired shape and size, and it also can be further formed more complex parts by welding or other metal cold working technology, including Laser cutting, punching, bending, riveting and so on (such as car body). The salient feature is must be same thickness with a whole part. Click here to know more: https://e-make.co/sheet-metal/ or call us at 86-75527209712. you can also write to us on info@e-make.co