The latest innovation in diamond technology makes it possible to sharpen side edges faster and more precisely than ever before. Compared to conventional whetstones, it is even preferable, as the disc can be rotated as required and the entire diamond material can be used. Changing the disc to a different grit is done quickly by opening the knurled nut. Four different grit sizes are available. The best thing about it is that the diamond material can be replaced when it wears out. When the self-adhesive disc is worn out, it can simply be pulled off and replaced with a new one, which means you save money by using the backing disc permanently.