Get an edge on things with the Fein Mini E-Cut Diamond Sharpening Blades. These diamond files come in three degress of coarseness, so you can get the one best-suited to your needs or all three for every need. The 6-37-06-014-02-6 is the finest of the sharpening blades with extra-fine grit for the smoothest job possible. You can use Feins Diamond Sharpening Blades with the MultiMaster to hone razor-sharp edges on knives and gardening tools.