King Pro Medium (800 Grit) Whetstone

Unlike Western (man-made) whetstones, water rather than oil is used on Japanese stones. This is to prevent the surface from being clogged with metal particles. The coarser stones come in grit: 250, 800, 1000, and 1200 grit. The 250 and 800 grit are faster cutting and used for repairing nicked edges or reshaping a bevel. The 1000 or 1200 grit stones are used for the first stage of the actual sharpening. Japanese water stones are softer than Western styles causing a fresh, sharp surface to be continually exposed to the tool edge.