Smith's Diamond Sharpening Stones feature multiple layers of micron sized monocrystalline diamonds that are securely bonded in nickel to a flat metal surface. The sharpening surface has a unique, overlapping hole design that speeds sharpening by collecting and holding the metal filings that ordinarily build up during the sharpening process. This allows the diamond abrasive to remain clean and clear, and enables you to aggressively sharpen your knife or tool edge to razor sharpness.
·Fine (yellow) 325 grit - designed for agressive removal of metal to quickly restore dull edges
·Plastic cover when not in use
·Non-slip rubber feet
·Components from China and USA
·Designed and assembled in USA