Specialty milling inserts have nonstandard geometry, such as a specialized shape, side length, or nose angle. They install in specific toolholders used in custom milling applications. These indexable inserts mount to a compatible toolholder, which attaches to a milling machine. They 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 from the machine. 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.