Kyoto Otani Toishi Seisakusho Nakatoishi Arashiyama Dimensions: Length 215mm, Width 73mm, Thickness 25mm Manufacturing Method: Resinoite Method (Resin Molding Method) Grit: Medium Grit (1000#) By blending natural stone powder, it offers a sharpening feel and finish close to natural stones. Due to the Resinoite method, please refrain from soaking the whetstone in water for extended periods. There is a possibility of softening or cracking due to the degradation of the binder. Application: Intermediate sharpening of blades