10pcs Burrs Tungsten Carbide Steel Files Burr Set 3mm Shank 6mm Cutting Head Diameter Metalworking Tool _x000D_ Description: _x000D_ _x000D_ This is a set of 10 pieces rotary burs in various shapes for multiple purposes, and it can be used to cut cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum, marble, jade, bone, etc._x000D_ _x000D_ _x000D_ Features:_x000D_ _x000D_ These burrs are made of tungsten carbide steel for high hardness and high abrasion resistance._x000D_ There are total 10 pieces burrs in various shapes that you can use for multiple purposes._x000D_ 3mm round shank would fit many electric powered or pneumatic powered tools._x000D_ Could cut cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum, marble, jade, bone, etc._x000D_ Widely used for carving, shaping and for the removal of sharp edges or corners, burrs and excess material._x000D_ _x000D_ Specifications: _x000D_ Material: Tungsten carbide steel_x000D_ Type: Double Cut, Single Cut(optional)_x000D_ Shank Diameter: 3mm_x000D_ Cutting Head Diameter: 6mm_x000D_ Speed: 1000~3700R/min_x000D_ Processing Hardness: 85HRA_x000D_ _x000D_ Note: _x000D_ Rotary file in pneumatic or electric tools, the speed is generally 1000~3700R/min, must clamp the tool firmly._x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 10 x Rotary Burrs