Designed for heavy-duty applications, these flap discs feature premium Zirconia Alumina grain on a durable poly/cotton backing, ensuring both longevity and an exceptional finish. With a size of 6 x 7/8 inches and a grit rating of 40, they excel in aggressive stock removal, making them the ideal choice for steel applications. Operating at an impressive RPM of 10,200, these discs are engineered to provide the fastest stock removal in the marketplace, while an active grinding aid ensures cool cutting with minimal pressure. Each box contains ten discs, offering an XL design with 35% more material than standard options, making them a reliable choice for professionals seeking efficiency and performance in their grinding tasks.