Description The 220 grit side is an extra coarse grit used for edge repair, while the 1000 grit side is a coarse grit used for establishing an edge In order for Waterstones to work properly, they must be soaked in water prior to use and the surface must be kept wet to develop the sharpening slurry. Because Waterstones are soft, they must be periodically flattened to maintain their effectivness
