Milling tools with interchangeable heads have a shank or holder that takes removable cutting heads. Without removing the shank or holder from the machine, the cutting heads can be swapped out for new heads of various styles, allowing one tool to be used for many milling jobs. Images and text are engraved onto workpieces by engraving mill heads. Mill complicated designs without sharp corners or make round-bottomed grooves and pockets with interchangeable ball end mill heads. End mill heads with interchangeable chamfers create a chamfered or beveled edge. A rounded outside edge is achieved using interchangeable corner-rounding end mill heads. The wide, flat head of the interchangeable slotting and slitting cutter heads creates slots or slits. A flat-bottomed, square-shaped groove is created using interchangeable square end mill heads. In high-volume metalworking and fabrication applications with high speeds, high feeds, and difficult-to-machine materials, exchangeable-head milling tools need fewer tool changes than solid tools.