Edge Master's Two-Sided Diamond Sharpening Stone will restore the edges of your knives and tools quickly. Made from heavy-duty industrial monocrystalline diamonds that are electroplated onto a steel base makes this a long-lasting sharpening stone. The stone has a perforated surface that aids in speeding up the sharpening process. There are unperforated areas for sharping pointed tools also. Double-sided diamond stone with 360 Grit for coarse reprofiling damaged/blunt knives and tools and 600 Grit for fine honing Sharpen dry, oil, or water are not required There is an initial break-in period. This stone will improve with the use Molded base with storage and non-slip feet for safety Suitable for all household and sporting knives as well as tools Avoid applying too much pressure, allow the diamonds to do the work. Clean surface and wipe dry after use Store dry