Nagano Skate De-Burring Diamond Plate
From Nagano Skate exclusive diamond hard sheets, those Frank's Signature burr stones are very efficient and always clean.
Blue (400): Gross burr, 1st step of polishing a new blade.
Red (600): De-burring after sharpening, 2nd step of polishing.
Gold (1200): De-burring and Polishing
Only use a dry cloth to clean them, no oil, no water.