High-performance tungsten carbide rotary burrs with cross toothing. The cross toothing provides a higher cutting capacity compared with the simple toothing. This particularly has a positive effect on materials which are difficult to cut. Fields of application: for high-alloy steels, non-rusting steels, acid-resistant steels, heat-resistant steels, die casts and plastics. To debur, break edges, trim, process welding seams, surface processing.