220 Grit is best for scuffing and de-whiskering primers and sealers For use with 5 inch hook and loop random orbit and DA sanders The premium P-grade aluminum oxide grain offers a consistent scratch pattern and creating a finer finish The hook and loop backing makes changing sheets quick and easy The vented hole pattern matches the sanders pad for maximum dust extraction The double resin bonding system resists heat and humidity, extending the life of the sanding discs The anti-clog coating reduces particle build-up, keeping the grain exposed longer and improving performance The film backing offers better edge wear and is tear resistant for longer life