Innovative, multi-patented DuoSharp Bench Stone is a precision flat, two diamond surfaced sharpener guaranteed to provide consistent, even sharpening every time. 8 DuoSharp Bench Stone is an excellent counter and bench sharpener, with a larger, wider diamond surface for sharpening a variety of edges. The model comes with the Bench Stone Base Accessory. Extra-Fine diamond (9 micron / 1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond - Fine diamond stone (25 micron / 600 mesh) for a razor sharp edge. Easy counter or bench use. Larger, wider diamond surface for sharpening a variety of knives and edges. Sharpens knives faster than conventional stones with DMTs monocrystalline diamond surface. No oil is needed-sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service.