DICK Maschinen Diamantschleifstift This simple sharpening solution can be used in drills and burr grinders up to a maximum rotation speed of 20,000 rpm. Run the grinding pen along the cutting edge and bow with light pressure. Thanks to the machine use and the high-quality diamond coating, the resharpening process is significantly shortened. This sharpening tool is also suitable for other cutting tools. Dimensions: 34 mm / diameter 4 mm