1. Unlike other sanding discs and paint removing wheels, these pads have great wear resistance and will not damage the aluminum while remove even tough paint in an old airstream. Besides, if you are looking for some wheels to polish stainless steel tube, then our buffing pads will make the tube repaired from small scratches and damages and to shine polished. 2. Our sanding grinding wheels set are suitable for angle grinder, polishing tools. Widely used for cleaning, finishing & polishing on metal, stainless steel, glass, jewelry, plastic, ceramics, marble, wood crafts. 3. Nylon Fiber Flap Discs with Sandpaper --- Can removes rust, paint and coatings of irregular curved quickly and easily, without damaging the ; High tenacity fiber, special viscose, resistant to water and oil, long service life. 4. Size Details --- All of angle grinder sanding discs are 4 inch in diameter and 16mm/0.62inch thickness and hole diameter. 5. 8Pcs Nylon Fiber Flap Wheels Set --- Including 2Pcs 120 Grit