The product is a pack of 10 Walter 15W612 6x7/8 ALLSTEEL Flap Discs with a 120 grit Type 27 rating. These flap discs are made of Zirconia Alumina material and are coated for added durability. The discs have a 6" diameter and a 7/8" center hole size, suitable for steel and stainless steel applications. With a maximum RPM of 10,200, these flap discs offer efficient sanding and grinding capabilities for metalworking projects.