Premier Red Zirconia Alumina Resin Fiber E-ZView Edger Flex-Loc Discs are ideal for heavy duty grinding of welds, gates, risers and parting lines on castings and carbon steels. The best choice for stainless steel. Strategically placed holes allow the operator to see the surface area being ground while the disc is spinning, enabling faster and more accurate work, and a superior finish. This product is part of the Carborundum BETTER product tier group.