Trend FTS/S/SFF Super Fine Finish Stone for Fast Track Sharpener Super fine finish stone for the Trend Fast Track sharpening system. FEATURES Monycrystalline diamond with unique Diamond Cross relief pattern which gives optimal abrasion rates to maximise sharpening efficiency and reduces clogging Diamonds are held by Nickel plating to a steel substrate, with ABS plastic base SPECIFICATION Size: 68.5 mm x 25.4 mm x 3.6 mm Grade: Super Fine Grit: 1200 (nom. 9 micron) Colour: Green