Bristle Disc: Radial Bristle Disc is a new type of abrasive that works better than sandpaper, flap wheels or other types of sanders, brushes or wheels. Compared to wire brushes, polishing and cleaning can be done more efficiently with less pressure. Versatile: Sturdy and flexible bristles can easily adapt to irregular, curved and complex shapes, cracks and corners, and can complete cleaning, deburring and polishing work. The processing effect is uniform and beautiful, without affecting the appearance and precision of the workpiece. Efficient: efficient bristles do not accumulate metal debris, rubber or plastic residue , thus eliminating cross-contamination and increasing service life. Complete Kit: Our hard disc polishing brushes come in 5 different grits, 5 different colors, each with 6 pieces to meet your different needs. Compatibility: The fine polishing brushes can be used for most general purpose tools such as Dremel drills, grinders and rotary tools. They are recommended for heads with speeds between 15,000 and 30,000 rpm.