Featuring tough zirconia alumina that sharpens itself during use, this ProSand H831 coarse grit paper H&L vacuum disc is ideal for coarse grit blending, stripping and sanding. The E-weight paper back is flexible yet strong and tear resistant, the hook and loop backing offers simple, straightforward disc replacement and the anti-static coating and open coat deliver an aggressive cut on applications that have problems with loading. Place this paper H&L vacuum disc in your right-angle grinder or random orbital sander to work on fiberglass, composites, wood and aluminum.