Quickly hone a razor-like edge with the uninterrupted diamond sharpening surface of this DMT 8" x 3" extra-coarse 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-coarse grit is perfect when significant removal of material is needed for damaged tools. It is also great for water stone flattening.