(100 200 400 800 Grit with attachment)The 4" stone polishing set is a great way to start off, at an affordable price. The kit allows you to manipulate the edges of stone such as smoothing off burrs and rough edges. Start off with the 100 grit pad, and work your way to the 800 grit pad for a polished surface. This kit is also perfect for removing stains from expensive marble and travertine stones, while set in place.