A great rotary tool sanding accessory set to meet your different needs. Different grit sandpaper sticks of the most commonly used types are ideal for DIY sanding, polishing, metal rust removal, smoothing, and deburring. The smaller the mesh number, the rougher it is, and the faster the grinding efficiency; the bigger the mesh number, the finer, and the slower the grinding efficiency. Recommended to gradually polish from the coarse number to the fine number, for accquiring best grinding effect. Metal molds and similar: Grinding and rust removal, deburring. Wood, peach pits, olive pits, etc.: Grinding and polishing. Raw materials like walnuts: Grinding, skin removal, and polishing. Jade, beeswax, emerald, etc.: Fine grinding and polishing.