Wire forms with compound bends typically are the most challenging. A compound bend is a feature within the wire form that has two adjacent bends or generations with no straight length tangent to the beginning and end of those radii.
![Marlin Steel wireform 00804001](https://www.marlinwire.com/hs-fs/hub/223565/file-1036249247-jpg/blog-files/00804001-300x300.jpg?width=240&height=240&name=00804001-300x300.jpg)
The ability to form a difficult shape ultimately comes down to the operator knowing the machine, its programming capability and the tooling. A skilled operator, for example, can use a grinder to create a little more clearance between compound bends.