Kyoto Tanaka Toishi Kogyosho Michibiki Series WA (Water Abrasive) Hard Type for Carpentry Tools Dimensions: Length 215mm, Width 79mm, Thickness 31mm Weight: 1040g Manufacturing Method: Vitrified Grit: Medium Grit Stone (1000#) Abrasive Material: WA (White Alumina) Tanaka Toishi Kogyosho Original Artificial Whetstone "Michibiki" Series. By using a special bond, it contains about twice the amount of high-grade abrasive material compared to general artificial whetstones, resulting in high grinding power and a quick finish. Please try it once. Please note that there may be small holes or lot numbers for hardness inspection. Available for immediate purchase.