Saburr Tooth burrs from America are a revelation in sculpting, shaping or smoothing wood, fibreglass, rubber, foam or silicone. They are available in many shapes, sizes and grades to suit your carving, so we have put together a set of the most popular shapes to cover a wide variety of applications. Long lasting, razor-sharp carbide cutting teeth are arranged into a unique open pattern to resist "loading" while providing the "Power Carver" rapid stock removal and smoother finishes. Sets contain: 8.20mmø x 12.7mm Ball Nose, 8.20mmø x 12.7mm Flame, 8.20mmø Spherical and a 3.2mmø x 22mm Tapered. Recommended operating speed 4,000 to 24,000rpm. For safety, always use approved eye protection and recommended safety devices. N.B. not suitable for use on metals or ceramics. The head size may vary slightly due to the coating thicknesses.