Square (S) turning inserts have four sides of equal length that form four cutting points with 90° nose angles. They have strong cutting edges for facing and general turning tasks in heavy roughing applications. These indexable inserts mount to a compatible toolholder, which attaches to a lathe or CNC turning machine. They can be rotated (indexed) to expose a fresh cutting edge when the old one dulls. They can be replaced with new compatible inserts of the same style or a different style without removing the toolholder from the machine. Indexable turning 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.