Black & Grey - Ultra Coarse (50) and Extra Coarse (80) Diamond Stones (2 each) mounted on handles. These stones are fast and aggressive, perfect for re-profiling and repairing your damaged blades quickly. 

Red & Orange - Coarse (100) and Medium Coarse (200) Diamond Stones (2 each) mounted on handles. 

Yellow & Green - Medium (400) and Fine (600) Diamond Stones (2 each) mounted on handles. 

Turquoise & Blue - The Extra Fine 800 Grit / Ultra Fine 1000 Grit Diamond Stones Pack include 2 each of 800 grit and 2 each of 1000 grit diamond stones, mounted on two handles. These stones refine and hone your edge, quickly giving you razor sharp results. They are also an excellent maintenance tool, making touch-ups fast and gentle on the knife by removing minimal metal while honing and polishing the edge.