VMC Vitro Flex Diamonds are of the latest technology. These resin bonded diamond abrasives can be used wet or dry and come in the following sequence: 00, 0, 1, 2, 3, & 4. A #5 grit is available if necessary. If the surface does not need to be cut deep then you can start with either #1 or #2. Then all you have is three or four steps and you are finished! Vitro Flex diamonds may be used on: marble, terrazzo, granite & concrete.