Carbide Burrs - AlumaCut M9-IE91-L5WE USA Made Carbide Burr for Aluminum SA-5AL, Style A, 1/2" Head Diameter, 1/4" Shank
Cylindrical-Square End. Carbide Burrs are most often used in Die Grinders. Carbide Burrs for Aluminum have fewer, deeper flutes to avoid clogging.