Convex End Mills and Concave End Mills are used to produce smooth, half round shapes in the workpiece. The convex shank type cutter are designed for milling an inward-curving (female) half-circle in the workpiece, while the concave shank type cutter is designed to produce an outward-curving (male) half-circle. Both cutters have full radius design with a weldon shank, and are form relieved for easy maintenance and resharpening.