1200 grit medium sharpening stoneA whetstone that needs to be soaked in water before useMade in japan by kingFor professional use the finer the grit, the denser the material, which leads to a finer finish of the surface of the tool. Finer grits cut slower because they remove less material. Grits are often given as a number, which indicates the density of the particles with a higher number denoting higher density and therefore smaller particles. Dimensions of the stone (inches): 8 1/2" x 2 1/4" x 3 1/4"material: Artificial stone origin: Japan grit: Ara-to,1200 (coarse).