Ideal for coarse grit blending, stripping, and sanding, the ProSand H831 coarse grit paper H&L vacuum disc uses tough zirconia alumina that self-sharpens. Its flexible E-weight paper backing is both strong and tear-resistant. The hook and loop backing allows for easy replacement, while the anti-static coating and open coat deliver aggressive cutting on challenging materials, including fiberglass, wood, composites, and aluminum.