Specification Brand : airgoesin BulletPoint1 : 20pcs HP Tungsten Carbide Cutter Kit Burs Lab Drill Polisher BulletPoint2 : Great for grinding both metals (i.e. copper, aluminum, etc.) and non-metallic materials (marble, jade, plaster, etc.) BulletPoint3 : Processing is high quality and smoothness and can be all sorts of high-precision shape BulletPoint4 : HRA processing hardness = up to 80. The diameter of burs is 2.35mm. The total length is 4.8cm. BulletPoint5 : Extremely durable - Lasts up to 10X longer than than high-speed steel cutting tools, and 200 times longer than wheels. Safe, reliable and convenient to use ConstructionType : Coated ExternallyAssignedProductIdentifier : 6912011532156 IncludedComponents : bare-tool ItemName : 10pcs/set Tungsten Steel Nitrate Carbide Buffing Burrs 3/32" (2.35mm) Shank ItemPackageQuantity : 1 ItemTypeKeyword : power-rotary-tools Manufacturer : airgoesin PartNumber : G6-1 ProductDescription : The diameter of burs is 2.35mm. The total length is 4.8cm. Great for grinding both metals (i.e. copper, aluminum, etc.) and non-metallic materials (marble, jade, plaster, etc.) HRA processing hardness = up to 80 High efficiency grinding - Up to 1000% more efficient than manual files and wheels Replaces small grinding wheels thereby reducing dust pollution Extremely durable - Lasts up to 10X longer than than high-speed steel cutting tools, and 200 times longer than wheels Allows for smooth, precise, and high-quality cuts and finishes Safe, reliable and easy to use!