Features: hese rotary burrs are made of 45 steel, which has advantage of high work efficiency, good grinding effect and long service life. The wood carving drill bit is designed with 1/4 inch round shank for clamp firmly, which is fit most rotary tools. Suitable for fine detail work, cutting, engraving and finishing. Rotary burr- processing efficiency than the manual file to improve of times, than with a small handle wheel to improve nearly ten times. It has 5 different shapes burr, including round, oval, cylinder, large cone and small cone to satisfy all you demand. Cuts soft wood and plastic effortlessly. It is suitable for grinding, polishing, shaping, carving, chamfering, deburring and burnishing. It is perfect for low hardness of the workpiece, such as soft wood and plastic. Specifications: Material:Stainless Steel Heads Diameter:11mm/0.43'' Shank Diameter:6mm/0.24'' Length:Approx.59mm/2.32'' Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 5x Rotary Burr Rasp Set