Guaranteed not to hollow or groove, DMTs 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 backseven conventional and water stones. Includes non-skid rubber feet. Diamond grit clearly marked on side of stone. Extra-Extra Fine grit. Extra-extra-fine diamond (3 micron / 8000 mesh) after sharpening an edge with coarser diamond grits, achieve the ultimate sharp edge with DMTs Extra-Extra Fine D8EE Dia-Sharp bench stone. As the finest grit bonded diamond abrasive bench stone available today, the D8EE offers a simple and easy solution to assuring the finest performance from all tools and knives in all applications. No need to fuss with fragile, messy and high maintenance Arkansas or Waterstones to attain a polished edge for your finest work. The DMT D8EE Dia-Sharp precision engineered diamond surface will stay flat throughout all your sharpening requirements without hollowing, chipping or cracking. Sharpening surface accommodates range of edges from large knives to small pointed tools. Sharpens knives faster than conventional stones with DMTs monocrystalline diamond surface. No oil is needed-sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service.