High-performance tungsten carbide rotary burrs with cross toothing. The cross toothing provides a higher cutting capacity compared with simple toothing. This particularly has a positive effect on materials that are difficult to cut. Fields of application include high-alloy steels, non-rusting steels, acid-resistant steels, heat-resistant steels, die casts, and plastics. Suitable for deburring, breaking edges, trimming, processing welding seams, and surface processing.