Precision CNC manufactured PFERD tungsten carbide burs offer unparalleled rotational balance, service life and performance. PFERD has decades of manufacturing experience, producing the highest performance bur on the market. Designed for machining materials of virtually any hardness, the superior performance of PFERD burs reflects an optimum combination of key parameters such as shape, number of flutes, spiral angle, rake angle, and concentricity. The high dimensional accuracy of these burs permits robotic/CNC usage and multiple re-sharpenings. High stock removal capability and long tool life provides outstanding machining results in minimum time, optimizing the labor costs of these premium-quality products. For use on pneumatic, electric, and drive shaft tools. Set contains 8 pieces of 1/4" Shank Aluminum (ALU) and Aluminum PLUS (ALU PLUS) cut burs in various shapes.