Indexable boring bar sets include multiple boring bars include multiple boring bars with different shank sizes, cutting head orientations, or insert shape and style compatibility. These sets are used by machinists who frequently change cut types or bore holes of different sizes in various workpieces. Indexable boring bars size, straighten, and finish the inside diameter of drilled or cast holes. They mount to a lathe or turning machine and remain stationary while the machine rotates the workpiece against the boring bar's cutting tip. The inserts are seated at the cutting tip and can be swapped out for new ones of the same type or different types without removing the boring bar from the machine. Each insert has multiple cutting edges, so it can be rotated (indexed) to expose a fresh cutting edge when the old one dulls. Indexable boring bars require fewer tool changes than solid tools in high-volume metalworking and fabrication applications with high speeds, high feeds, and difficult-to-machine materials.