Swix Diamond Stone - Medium 70 2014 - The Swix Medium Coarse Diamond Stone is 400 grit and is the second in your must have diamond collection to maintain a smooth and sharp edge. This diamond stone starts to bring out that high polish shine that you love to see. . Bearing Grade: High Performance, Tool Type: Stone, Model Year: 2014, Product ID: 247166, Model Number: TAA400S, GTIN: 7045950831567