For non-ferrous metals, light alloys and aluminium extrusions. Triple-chip ground tungsten carbide-tipped teeth. 80 teeth. 5° negative rake. 30mm bore with 25mm, 20mm and 16mm reduction rings included. For non-ferrous metals, light alloys and aluminium extrusions. Triple-chip ground tungsten carbide-tipped teeth. 80 teeth. 5° negative rake. 30mm bore with 25mm, 20mm and 16mm reduction rings included.