Wicked Edge Premium Grit Diamond Stones Pack. They maintain the micro-serrations needed for a working edge but leave a refined enough finish to cleanly slice through delicate materials. These are a necessary step for a polished finish. These Diamond Stones have a break-in period of about 20 sharpening sessions and an average lifespan of 700 sharpenings. Specifications for Wicked Edge Premium 800/1000 Grit Diamond Stones Pack: Manufacturer: Wicked Edge Grit: 1000 Ultra Fine 800 Extra Fine Fabric/Material: Diamond Color: Purple/Blue/Grey Size: Pair Features of Wicked Edge Premium 800/1000 Grit Diamond Stones Pack: Grit Range: 800 (orange) and 1000 (grey) for fine finishing. Edge Characteristics: Maintains working micro-serrations while refining the cutting edge. Break-In Period: Approximately 20 sharpening sessions. Longevity: Average lifespan of 700 sharpenings Package Contents: Premium Monocrystalline 800 Grit and 1000 Grit Diamond Stones Wicked Edge WE8001000: Extra Fine 800 Grit / Ultra Fine 1000 Grit Diamond Sharpening Stone