Specification Brand : uxcell BulletPoint1 : Specifications: Shank diameter: 3mm(1/8"), cutting edge diameter: 6mm(1/4"). Fits most rotary die grinders BulletPoint2 : Long Working Life: Made of heat-treated tungsten carbide that hardness can be up to above HRA85, sharp and sturdy, long service life BulletPoint3 : Double Cut Design: The groove lines are crossed. Double groove rotary files are more suitable for the object density is relatively low, such as wood, plastic, aluminum. With good milling and cutting performance, ensures high work efficiency. BulletPoint4 : Versatile Use: Widely used for metalwork, tool making, model engineering, wood carving, jewelry making,welding, chamfering, casting, deburring, grinding, sculpting BulletPoint5 : Tips: Requirement of the carbide burrs rotating speed is: 4000-50000 rpm. Always ensure your burrs shank is well inserted into your collet and clamped down tightly GpsrSafetyAttestation : 1 ItemName : uxcell Tungsten Carbide Rotary Files 1/8" Shank, Double Cut Ball Shape Rotary Burrs Tool 6mm Dia, for Die Grinder Drill Bit Wood Soft Metal Carving Polishing Model Engineering, 6pcs ItemPackageDimensions_Height : 0.2 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 6 ItemTypeKeyword : cutting-burrs Manufacturer : uxcell PartNumber : a24022700ux0110 ProductDescription : Description: Used for metal working in and pattern making, die sinking, surface cleaning and maintenance. Suitable for cleaning up welds, grinding weld beads, shaping parts,smoothing rough castings, or porting cylinder heads. Generally use with handheld electric or pneumatic tool drive (can also be used in machine tool), Vast used in the industries of airplane, ship building, automobile, machinery, chemistry etc.