K Kwokker 20Pcs Carbide Rotary Burr Set 1/8" Shank, 1/4" Head Length Material: Tungsten carbide Type: Carbide Rotary Burr Set Machining hardness reach HRA85 . Total length: 43-51 mm Cutting diameter: 1/4 Inch(6mm) Shank length: 35mm Shank diameter: 1/8 inch(3mm). Suggested RPM: 25000-50000, Max RPM 70000. Quantity: 20Pcs Read more Features: Carbide rotary burr set processing all kinds of metal (burr bits for metal carbide burrs for steel including all sorts of hardened steel) and non-metal (such as marble, jade). Machining hardness reach HRA85 . For the most work rotary burr set can be replaced with small grinding wheel, and no dust pollution. High efficiency, high-quality finish, long service life, good economic returns. Easy to use, safe and reliable, can reduce labor intensity. Mechanical parts chamfering, rounding and groove processing. Dual Chamber is crossover lines, not easy to block the lines, more suitable for the object of relatively low density material. 20 different types: Oval, inverted cone, pointed cone, ball nose cone, ball nose, pointed tree nose, flame, ball, cylinder with round head, cylinder with end cut, etc. Warm prompt: A. Can be used in pneumatic grinders, electric grinders, machine tools, bench drills. B. Please control the speed: 6000-50000 speeds per minute. C. It is recommended to use protective glasses when working. D. When using the tool, it is necessary to clamp well, cut in one direction and avoid reciprocating cutting.