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.