Rotary Burr Ball Nose Tree 6mm Diameter - Quality Garryson tungsten carbide burrs. Garryson is committed to being the leading manufacturer and supplier of tungsten carbide rotary burrs in the world. They strive, through a combination of state-of-the-art technology, rigorous quality procedures and highly skilled people to provide cost effective solutions and support. Major investment in the latest CNC grinding equipment has enabled Garryson to become the largest manufacturer of tungsten carbide burrs in the UK. The complete range of burrs is available in all shapes, sizes and cuts.