DMT 10-in. DuoSharp Bench Stone for Fine/Coarse with no base. Precision flat, two-diamond surfaced sharpener guaranteed to provide consistent, even sharpening every time. Two sided sharpening in coarse diamond to transform a dull edge and fine diamond for a razor sharp edge. Sharpens knives faster than conventional stones with DMT’s micronized monocrystalline diamond surface. No oil is needed-sharpen dry or with water.Precision flat, two-diamond surfaced sharpener guaranteed to provide consistent, even sharpening every timeTwo sided sharpening in coarse diamond to transform a dull edge and fine diamond for a razor sharp edgeSharpens knives faster than conventional stones with DMT’s micronized monocrystalline diamond surfaceNo oil is needed-sharpen dry or with waterDurable construction will provide years of performance and reliable serviceWARNING: use of this product can expose you to chemicals including nickel which is known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov.