The MPOWER 8x12 Inch Triple Diamond Sharpening Whetstone is not just a sharpening stone, but an entire system for creating perfectly sharp tools. It can be used to sharpen any tool to razor sharpness right in your workshop. The tool consists of three diamond stones with different grits: 300, 600 and 1200 grit. The total diamond surface area is 66 square inches. The set has three leather straps of different stiffnesses for straightening, and they are magnetized for easy replacement. The set comes with three types of polishing paste: 1800, 2500 and 5000 grit. With them you can bring your tools to a mirror-like shine. The surface of the stones is CNC machined and has an accuracy of only +/- 0.00175 inch. The entire set is packed in a sturdy canvas case.