Specification Brand : uxcell BulletPoint1 : Specifications: Shank diameter: 6mm(1/4"), 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 Color : EWK-KKQM14 FinishType : Uncoated IncludedComponents : Comes as a Combo Set ItemName : uxcell Tungsten Carbide Rotary Files 1/4" Shank, Double Cut Top Toothed Cylinder Shape Rotary Tool 6mm Dia, for Die Grinder Drill Bit Wood Soft Metal Polishing Model Engineering, 2pcs ItemPackageDimensions_Height : 13.462 centimeters ItemPackageDimensions_Length : 2.54 centimeters ItemPackageDimensions_Width : 9.652 centimeters ItemPackageQuantity : 1 ItemShape : Cylindrical ItemTypeKeyword : cutting-burrs Manufacturer : uxcell Material : Alloy Steel Material1 : Carbide Material2 : Ultra-Micrograin Carbide MeasurementSystem : Inch ModelNumber : a18122800ux0594 NumberOfItems : 2 PartNumber : a18122800ux0594 Pattern : Double-Cut ProductDescription : Description: Used for metal working in molding 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.