Indexable drill bits have a fluted body that accepts replaceable cutting inserts to form a cutting edge for drilling holes into workpieces. Also called insert drills, they have mounting seats at their tip that are sized and shaped to hold specific indexable inserts. 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 drill bits from the machine. Indexable drill bits require fewer tool changes than solid tools in high-volume metalworking and fabrication applications with high speeds, high feeds, and difficult-to-machine materials.