Trend FTS/S/P Preperation Stone for Fast Track Sharpener Replacement preparation stone for the Fasttrack 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: Extra Coarse Grit: 220 (nom. 60 micron) Colour: Black