Helical chamfer mills are made to mill a chamfer on an edge. Choose from three or five helical flutes to address the widest range of materials. The 3 flute configuration is ideal for maximum chip evacuation while the 5 flute configuration is recommended for harder materials. These solid carbide tools come in diameter sizes from 1/8” to ¾”, and have included angles of 60, 90, and 120 degrees. The tool tip diameter held to + /– 0.002 for fast set-ups Helical chamfer mills are not recommended for plunging countersinks.