? Single Grit Benchstone,Benchstones ? Produce the keenest, most precise finish possible as well as polished, razor-like edges with the Norton Hard Arkansas Stone Single Grit Benchstone. Hard Arkansas stones are very dense fine grained natural stones; the natural novaculite delivers the sharpest possible edge with a near mirror finish. Use with oil for the best sharpening action and minimal clogging. Ideal for hand dimensioning and sharpening of tools that need flat, sharp edges. ? Natural premium novaculite quarried in Arkansas delivers the sharpest possible edge with a near mirror finish ? Benchstones are ideal for hand dimensioning and sharpening of all types of knives, plane blades, chisels, scrapers, or any other tool that needs a flat, sharp edge ? Hard Arkansas stones are very dense fine grained natural stones and are used to produce the keenest, most precise finish possible as well as polished, razor-like edges ? The use of oil with sharpening stones enhance the sharpening action and minimize the clogging of the stone's surface ? Norton Sharpening Stones have been the world leader for over 150 years