Norton Bear108 Combination Bench Knife Sharpening Stone25x50x200mmFine/CoarseSizes: 25x50x200mmNorton Bear Silicone Carbide Oil FilledCombination Bench StoneBear stones are widely regarded as the best brand of stone in the meat industrythis is what the butchers useIdeal for any form of the meat industry or hospitalityIdeal for general sharpening of flat wood working tools and Knives.This combination bench stone has one side fine abrasive the other side coarse abrasive.Start sharpening on coarse side and finish with fine side.Lubricate stone with clean oil when sharpening tools.If stone becomes clogged wash with kerosene.