Strip or scuff your concrete surface in your garage before refinishing it with the Bulldog Epoxy Products 17" sand screen disc! This disc measures 17" in diameter, and its 60 grit rating means it's suitable for medium sanding. Its durable, open weave construction is designed to prevent clogs from saw dust and other shavings, and each disc is made of waterproof resin and abrasives for consistent, long-lasting use.