DMT D10F 10-Inch Dia-Sharp Continuous Diamond Fine Superior diamond sharpening stones Legendary quality Made in the USA Sharpening surface accommodates range of edges: From large knives to small pointed tools Fine diamond for a razor sharp edge Sharpens knives faster than conventional stones with DMT's monocrystalline diamond surface No oil is needed-sharpen dry or with water Durable construction will provide years of consistent performance and reliable service