Guaranteed not to hollow or groove, DMT®’s precisely engineered Dia-Sharp® Bench Stone with continuous diamond surface assures consistent, even sharpening every time. The 8" length is great for both long and short knives providing cutting edge performance for a quick, keen edge on small contact areas and pointed tools. Perfect for flattening plane soles, irons and chisel backs—even conventional and water stones. Includes non-skid rubber feet. Diamond grit clearly marked on side of stone. Choose from the following grits: Extra-Extra Coarse (XXC), Extra Coarse (XC), Coarse (C), Fine (F), Extra Fine (XF).