Specification Brand : Auniwaig BulletPoint1 : 【High-speed Steel Tool】- Good for general purpose applications, offering combination of hardness and toughness for wear resistance, long service life BulletPoint2 : 【Versatile Use】- Widely used for metalwork, tool making, model engineering, wood carving, jewelry making,welding, chamfering, casting, deburring, grinding, sculpting BulletPoint3 : 【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 BulletPoint4 : 【Double Cut Design】- The lines are crossed. Double groove rotary files are more suitable for the object density is relatively low, such as Wood, Plastic, Aluminum BulletPoint5 : 【Specifications】- Shank diameter: 4mm / 0.16-inch, cutting edge diameter: 4mm / 0.16-inch, cutting edge length: 35mm / 1.38-inch, total length: 60mm / 2.36-inch; Fits most rotary die grinders ItemName : Auniwaig 2PCS 0.16" Shank HSS Rotary Files,4mm Dia Double Cut Top Flat Cylinder Shape Rotary Burrs Tool for Die Grinder Drill Bit Wood Soft Metal Carving Polishing Model Engineering ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 5 centimeters ItemPackageDimensions_Width : 5 centimeters ItemTypeKeyword : power-rotary-tools Manufacturer : Auniwaig PartNumber : CU2610M2103HF-FBA ProductDescription : Auniwaig HSS Rotary Files Package Content: 2pcs x Rotary Burrs Specification: Material: HSS (High Speed Steel) Surface Treatment: Nickel Plating Shank Diameter: Approx. 4mm / 0.16-inch Cutting Edge Diameter: Approx. 4mm / 0.16-inch Cutting Edge Length: Approx.35mm / 1.38-inch Total Length: Approx. 60mm / 2.36-inch Description: 1.These burrs are made of high speed steel for high hardness, high abrasion resistance and high heat resistance. 2.Works with mostly small rotary tools for DIY carving fans. 3.Double cut design - The lines are crossed. Double groove rotary files are more suitable for the object density is relatively low, such as Wood, Plastic, Aluminum