Specification Brand : HARFINGTON BulletPoint1 : Size - 3mm diamond-coated grinding bit, ball shape grinder head, high strength, and good coaxiality. BulletPoint2 : Material - Made of carbon steel and the diamond coated grinding head, higher wear resistance, and durable use. BulletPoint3 : Application - Can be used for grinding most hard materials such as iron, platinum, silver, and other metals. Suitable for sharpening, deburring, grinding, and carving. BulletPoint4 : Features - Good grinding tools for precious stone jade carving, mold repairing, cast cleaning, rust polishing, and DIY hobbyists. BulletPoint5 : Note - The 1/8 Inch (3mm) shank bit fits most electronic grinders, engraving machines, hanging mills, etc. Please be careful of flying chips during use! Color : Black CustomerPackageType : Standard Packaging CutType : Double Cut ExternallyAssignedProductIdentifier : 8414753505361 ExternallyAssignedProductIdentifier1 : 722367589966 ExternallyAssignedProductIdentifier2 : 0722367589966 ExternallyAssignedProductIdentifier3 : 00032277601390 FinishType : Rough Tungsten Carbide IncludedComponents : Tungsten Carbide Burr ItemName : HARFINGTON 30pcs Diamond Grinding Burrs Carving Bits 3mm Ball Shape Head Mounted Point 1/8 Shank for Rotary Tool ItemPackageDimensions_Height : 15 centimeters ItemPackageDimensions_Length : 1.7 centimeters ItemPackageDimensions_Width : 14.9 centimeters ItemPackageQuantity : 1 ItemShape : Cylindrical ItemTypeKeyword : cutting-burrs Manufacturer : HARFINGTON Material : 45# Steel Material1 : Diamond Material2 : Carbon Steel MeasurementSystem : Imperial ModelNumber : 60139 NumberOfItems : 1 PackageLevel : unit PartNumber : hta220823hh0444 ProductDescription : 3mm diamond-coated grinding bit, ball shape grinder head, high strength, and good coaxiality. Made of carbon steel and the diamond coated grinding head, higher wear resistance, and durable use. This grinding drill bit is suitable for quickly cutting, sharpening, deburring, grinding, rust polishing, carving, and repairing. Good grinding tool for the rough grinding surface of materials such as jade, ceramic, glass, wood, marble, and precious stone. The 1/8 Inch (3mm) shank bit fits most electronic grinders, engraving machines, hanging mills, etc. Note - Please be careful of flying chips during use!