Product details:

This claim is based largely on two properties – the speed at which the Shapton stones cut and the edge they create. Shapton stones are designed to be harder, faster cutting, and denser than any other ceramic waterstone on the market. Because they remove material quickly, the time required to hold a tool angle on the stone is reduced, making freehand sharpening much easier. Equally important to cutting speed is the consistency of the finished edge. The sharpest.