Rotary BurrQuantity: 4pcs; Shank Diameter: 6mm; Cutting Edge Diameter: 8 - 10mm; Total length: 154 - 160 mm. Practical and DurableHigh quality tungsten carbide rotary burr with a machining hardness of up to hrc70, can process various metal and non-metal materials. High EfficiencyThe machining of the rotary burr is of good quality and high finish, dozens of times more efficient than machining with a file, and nearly ten times more efficient than machining with a small handle grinding wheel. Main ApplicationWidely used for finishing all kinds of metal mold type cavities, handicraft engraving, cleaning burrs and welds, chamfering mechanical parts, polishing impeller channels, etc. Instructions for UseThis tungsten steel burr is mainly used on electric tools or pneumatic, tightening before operation, the drive speed is generally controlled at 6000-50000 rpm. Product Specifications: Material: solid carbide tungsten steel Cutting head type: double cut. Shank diameter: 6mm Cutting edge diameter: 8mm, 8mm, 8mm, 10mm Total length: 154mm, 155mm,155mm, 160mm Warm Tips: 1.Please clamp the tool when using it, and wear protective tools to prevent chips from scattering during work. 2.Please allow slight errors in product size and color due to the difference in measurement methods. measurement and display screens.