The Tuff-Grit Coated Abrasives 5″ 36 A/O Fiber Disc 18487 by Benchmark Abrasives is a professional-grade product made to MPA standards. It features aluminum oxide material with a heavy-duty vulcanized fiber backing, designed for fast stock or weld removal on all metal surfaces. With a maximum RPM of 8,500 and a quantity of 25 in a box of 8, these fiber discs offer high quality and performance for industrial metalworking applications. Free shipping and tracking add value to this reliable and durable sanding disc solution.