Wisemen Trading Scythe Sharpening Stone Blue Synthetic Sapphire 9in x 1.38in x 0.5in. Made from heat-treated blue synthetic sapphire crystals in a ceramic bond they cut quickly yet leave a very fine finish. They absorb water readily and hold it well leaving a thin layer of moisture on the surface to keep them biting without glazing. The resulting edges are not only shaving-sharp but downright ''tacky'' with slicing aggression. Finer than any of the other scythe stones they offer but no less rapid in their honing action. The medium-hard bond allows the stone to be used with firm pressure if desired and to resist gouging when used to hone dinged or rolled edges. Specifications for Wisemen Trading Scythe Sharpening Stone: Manufacturer: Wisemen Trading Grit: 22 Micron Length: 9 in Dimensions: 9 x 1.38 x 0.5 in Package Contents: Wisemen Trading Scythe Sharpening Stone Wisemen Trading 4313: Scythe Sharpening Stone Blue Synthetic Sapphire 9in x 1.38in x 0.5in