3x the coarsness for 3x the speed.
The coarse diamond grinding disc is three times rougher than the standard diamond and therefore more abrasive. It is suitable for quickly grinding especially dull knives or for correcting slightly chipped blades. When used for the first time, some excess diamond particles may flake off, but the coarse diamond grinding disc will then achieve the surface it will retain in subsequent use. Used correctly, it should not need replacing.
Not compatible with the Horl 2 Cruise.
