Seller: woodcraft_supply (7,420) 99.8% , Location: Vienna, West Virginia, Ships to: US, Item: 252797918577 Brand: Pinnacle, Details: Sets includes the full range of grits – Washita, soft and hard. These are the finest of the natural stones, known the world over for their unique crystalline structure. True novaculite, these stones remove less metal than manmade stones and polish while sharpening. The resulting edge is longer lasting and sharper, achieved with fewer stones and less effort.Arkansas stones must be used with a lubricant.It keeps the stone's surface from clogging, reduces the effort required to sharpen and keeps it clean.Oil or water may be used, but if you decide to go with oil as a lubricant, you must continue to use oil since water will no longer be absorbed by an oil soaked stone.Washita stones are the softest and most aggressive. Used for taking out large nicks, re-beveling and flattening. Soft Arkansas stones are slightly softer than hard Arkansas. Best general duty stone for multi-purpose sharpening. Hard Black stones are the hardest and finest stones. Used for a honed, highly polished edge. Arkansas Stone Sets includes the full range of grits – Washita, soft and hard. Hardwood storage boxes included. Stone colors may vary.