Features: _x000D_ These burrs are made of cemented carbide for high hardness, high abrasion resistance._x000D_ _x000D_ There are total 4 pieces burrs in various shapes or sizes that you can use for many purposes. _x000D_ 6mm round shank would fit many electric powered or pneumatic powered tools._x000D_ _x000D_ Could cut cast iron, cast steel, bearing steel, high carbon steel, chromium nickel alloy, bronze, brass, marble, jade, bone, etc._x000D_ _x000D_ Widely used for carving, shaping and for the removal of sharp edges or corners, burrs and excess material. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Cemented carbide _x000D_ _x000D_ Shank Diameter: 6mm_x000D_ _x000D_ Head Diameter: Large F--12mm; Small F--10mm; C--10mm; D--10mm _x000D_ Quantity: 4 _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 4 x Rotary Burrs 1These burrs are made of cemented carbide for high hardness, high abrasion resistance 2There are total 4 pieces burrs in various shapes or sizes that you can use for many purposes 36mm round shank would fit many electric powered or pneumatic powered tools 4Could cut cast iron, cast steel, bearing steel, high carbon steel, chromium nickel alloy, bronze, brass, marble, jade, bone, etc 5Widely used for carving, shaping and for the removal of sharp edges or corners, burrs and excess material