This 10 PC electric polishing kits are for DIY polishing engraving, carving, polishing (wood mold, metal polishing). This is high quality tungsten steel carbide 3*6mm taper burr electric dremel grinding accessories. Features: Our electric polishing kits has carbide rotary burrs, tungsten steel carbide burr, grinding head and rotary cutting tool burr. Suitable for processing cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, also marble, jade, non-metallic bone etc.. High working efficiency, perfect grinding effect and long using life. Basically replace with handle small wheel and no pollution of grinding dust. Convenient to grind, simple to use, safe and reliable. Specifications: Color: Silver Material: Tungsten Steel Working-hardness: HRA85 Type: Rotary Burr Shank Diameter: 3mm/0.12in Point Diameter: 6mm/0.24in Shape: Cylindrical(A-type); Cylindrical Ball Head(C-type); Round Ball(D-Type); Oval(E-type); Arc-shaped Ball(F-type); Spire(G-type); Torch(H-type); Round Cone Head(L-type); Pointed(N-type); Inverted Cone-shaped(M-type) Item Weight: Approx. 48.3g/1. 7oz (10pcs) Package Size: Approx. 10 * 6.5 * 1.3cm / 3.9 * 2.6 * 0.5in Package Weight: Approx. 76.3g / 2.7oz NOTE: 1. When the cemented carbide rotary tool works on the pneumatic or electric tool, the rotating speed is usually 40000-6000rpm, so you need to clamp the tool tight. 2. The cutting direction is from right to left even move, do not like the grinding wheel used for cutting according to the reciprocity; do not fatigue (the pressure is generally less than 4kg). Package List: 10 * Tungsten Steel Carbide Grinding Card