Aggressively removes paint and rust from seams, door jambs, drip moldings, pinch welds and other difficult-to-reach areas. 3-dimensional abrasive web conforms to work area. Safer than wire bristle tools. Durable web design lasts longer and will not rust. Maximum operating speed 8000 RPM. Abrasive Mineral Type Silicon Carbide. Color Purple. You get 10 Discs in a box.