Qumrya heavy-duty sanding flaps are engineered for high-performance operation. Measuring 4.5" in diameter and 4" in width with a standard 3/4" 4-key arbor hole, these flaps are constructed from premium aluminum oxide that delivers heat and moisture resistance. They efficiently strip away tough coatings such as paint, limescale, oxidation, and rust. Versatile in application, they can be used on a wide range of materials including metal, wood, rubber, glass, plastic, and fiberglass, making them an ideal accessory for surface finishing, linear grinding, polishing, and contour grinding equipment.