The Multi-Oilstone Sharpening System will assure the sharpest blades in the kitchen. The System has three stones coarse, medium and fine. The system also comes with oil and a reservoir. The coarse stone will easily restore worn edges, the medium stone will fix up the average knife edge and then the fine stone will hone and help produce the sharpest edge. The oil will help increase the life of the sharpening stones. The unused stones should be soaked in oil until they are ready to be used. Great for all kitchen knives. - Sold per each