ProSand Norton Sandpaper Sheets provide superior sanding performance for premium finish on all surfaces and coatings. Premium heat-treated aluminum oxide abrasive keeps the grain sharp under pressure for faster cut rate and longer life than regular aluminum oxide products. Fiber-reinforced and latex saturated backing allows sandpaper to be flexible and tear-resistant for easy folding. Excellent clog resistance thanks to non-pigmented, water-based stearate coating. No color dye, so no need to worry about color transferring to your work piece. 400 Grit - Final finishing