You'll notice straightaway the difference in quality, the ease of sharpening, and the sharpness of your knives' blades. Each stone is natural, not common synthetics. Even the fine, black Arkansas stone is natural, a rarity today. Plus, as any skilled knife sharpener will attest, the 8" stones provide the proper length, angle, and "sweep" of the blade on the stone. Many stones are too short. Handy, triangular, and compact design. 1-oz. bottle of oil. Complete instructions. Mukilteo, Washington.