Flap discs are created by overlapping coated abrasive flaps. The flaps are adhered firmly to a back-up plate. This design provides a cooler running, longer lasting disc. And because new layers of abrasive are constantly being exposed, a very consistent finish is provided during the life of the disc. These discs are specifically recommended for high stock removal on stainless steel, carbon steel, aluminum, and most alloys. They have a long life and stay sharp for 10-15 times longer than conventional fiber discs. They are easy to use and cost effective.