Undercutting End Mills | McMasterCarr
These end mills have a long shank and a cutting edge that curves around the top of the ball end, allowing them to reach into pockets to create undercuts. Made of solid carbide, they are harder, stronger, and more wear resistant than highspeed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup ...