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Auto rotating diamonds, grit size 120, Sharpening by quick grinding (rough), especially for edges hardened on the surface (hardened by stones or caused by a too heavy machine sharpening).
The diamond disks rotate automatically by the backward and forward movement along the edge. This patented system has three advantages:
Due to rotation, there is no wear of the diamond in grooves with the risk of rounding the edges.
The grinded material does not clog the diamond.
Grinding is three times quicker.
The Roto-Finish is fixed to the Tuning-File handle. They are available in 4 grit sizes and are supplied with 2 self- adhesive replacement diamonds.
Use of grit size 120 needs finishing with grit size 200, more preferably grit size 400.
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