DMT 8in DuoSharp Bench Stone E/F Hardcoat Surface with Base is an innovative, multi-patented DuoSharp bench stone. With a precision flat, two diamond surfaced sharpener guaranteed to provide consistent, even sharpening every time. Now offered with Hardcoat surface for extra durability when used specifically for the hardest steels and ceramic blades. Designed to withstand the rigors of sharpening ceramic knives,this 8 DuoSharp bench stone is an excellent counter and bench sharpener, with a larger, wider diamond surface forsharpening a variety of edges. The model comes with a Bench Stone Base Accessory. HC Extra-Fine diamond (9 micron /1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond; HC Fine diamond (25 micron / 600 mesh) for a razor sharp edge. Sharpening with diamonds is fast and easy. Made in USA.