Norton® Cotton Fiber A80-HBF3 80 Grit 1/4" Dia X 1/2" Aluminum Oxide Mounted Point is ideal for blending and polishing hard-to-reach places. W163 Mounted point has shank Dia of 1/8" and features 60000 RPM that is suitable for various materials. Mounted point with aluminum oxide abrasive is sold as 25 per pack.