Indexable milling inserts attach to compatible toolholders or tool bodies on milling machines to provide a cutting edge that removes material to shape and add features to workpieces in milling applications. The inserts can be rotated (indexed) to expose a fresh cutting edge when the old one dulls. They can be replaced with new inserts of the same type or different types without removing the toolholder or tool body from the machine. Ball-nose inserts have a rounded nose for profiling and contouring. Other inserts are differentiated by shape and cutting-point nose angle. Generally, inserts with fewer sides have small nose angles to reduce vibration and those with more sides have wide nose angles to increase cutting-edge strength. Indexable milling tools require fewer tool changes than solid tools in high-volume metalworking and fabrication applications with high speeds, high feeds, and difficult-to-machine materials.