For a larger diameter, click on the drop-down list. Diamond disc "Python". Invested with high quality diamond material. Suitable for all angle grinders with a 14mm shaft. This is a standard size. Only for grinders with variable speed. As the disc is fully covered, you can use it to grind and sharpen. Can be used for all types of stones. Also for non-ferrous, glass, ceramics, etc. The maximum speed for this disc is 10,000 rpm, which means that you need a sharpener with variable speed.