Metal notching and punching machines create notches or holes in sheet metal or pipes and tubes. They are commonly used to prepare workpieces for joining and assembly applications. Sheet metal punches cut clean, accurate holes in flat metal workpieces. Sheet metal notchers carve out rectangles, triangles, and other shapes along the edges of flat metal workpieces. Pipe and tube notchers make curved or squared cutouts on the ends on pipes, tubes, and bars.