The PFERD Flap Disc is engineered for high-performance grinding on steel surfaces, measuring 4-1/2 inches in diameter with a 5/8"-11 arbor size, making it compatible with most angle grinders. Crafted from durable zirconia, this conical disc features a 36 grit rating, ensuring fast and efficient material removal while maintaining consistent grinding aggressiveness throughout its lifespan. With its exceptional durability and economic efficiency, this flap disc minimizes wear and maximizes stock removal, making it an ideal choice for both professional and DIY applications. Originating from Germany, it embodies the quality and precision synonymous with PFERD products.