They last many times longer than a wire brush. These reliable brushes have nylon bristles for use on wood, metal and stone. < p>You will have to sand the project in all directions to reach the etched areas, but this will avoid small wood fraying and will smooth the areas nicely without leaving marks. Suitable for derusting, deburring and parquet brushing to gently brush annual rings on wood. High durability, does not fall off, absolutely wear-resistant and shortens polishing time, improving the efficiency of the equipment.