Morton Mini Grid SurfaceIncludes two interlocking panels that form a 22" x 15" surface when put together. These sturdy plastic grid surfaces are designed to be used as the base for the Morton Portable Glass Shop, but they're great for other applications too! Use them as a surface for freehand cutting of glass; they'll catch the chips and small glass shards, keeping them out of your hands and off your table. They're also great for using under grinders to keep water and debris