Features: 1.Size Details: The total length of the set is about 49?63mm, the shank diameter is about 6mm (1/4inch), the outer diameter of the tip is about 8mm/0.31in. 2.High Quality Materials: The single cut burr set is made of premium quality tungsten carbide with heat treated process, the hardness can reach HRC70. 3.Wide Application: The cemented carbide cutting burr set is very suitable for fine detail work, and widely used in metal products, woodworking, model engineering, jewelry making, welding, etc. 4.Match to Use: Generally can be used with hand?held electric or pneumatic tools with the speed of around 6000?50000rpm, also for machine tools (the above is not included). 5.High Performance: The burr file set is with ten times higher than the durability of high speed steel cutters, and more than 200 times higher than small grinding wheels, has a long service life. Specification: Item Type: Cutting Burr Set Material: Tungsten Carbide Granularity: 1000 Mesh Outer Diameter: Approx. 8mm / 0.31in Shank Diameter: Approx. 6mm / 1/4in Application: Used in polishing and grinding, machinery, aviation, automobile, shipbuilding, chemical industry, craft carving and other industrial sectors. PackageList: 5 x Cutting Burr 5 x Storage Box