Gator Premium Sanding Sponges combine the convenience and usability of a high-density foam sanding block with an advanced aluminum oxide sanding technology. These sponges employ an AlumiNext blend grit that cuts faster and lasts longer than standard sandpaper for better results. Works on a wide range of substrates making it a go-to for both DIYers and professionals. Use on paint, wood, metal, drywall, and fiberglass Features anti-clogging technology to prevent particulate build up and keep sponge working longer Integrated sponge block provides exceptional comfort and control while working Medium 80 grit helps remove layers of paint, rust, wood and other coatings