Quickly hone a razor-like edge with the uninterrupted diamond sharpening surface of this DMT 6" x 2" extra fine dia-sharp stone. This continuous diamond surface stone provides a cutting edge performance and is recognized for superior quality. Sharpening with diamonds is fast and easy. No oil is needed. You can sharpen dry or with water. Extra Fine polishes and refinesa razor edge after sharpening the tool or blade on a coarser grit. It is also great for water stone flattening.