A worker polishes a shiny metallic rotating part on a lathe. Polishing is used to reduce surface roughness of product. With help of polishing to obtain mirror surface, high precision and beautiful presentation of product. On lathes polishing is done with sandpaper or sanding belt. Sanding belt, emery cloth, sandpaper is paper-based and rag, of different granularity. In this case, employee secured a grinding material on a wooden bar.