The Wüsthof 8 Superfine Whetstone is the ultimate solution for knife maintenance and honing, with two levels of superfine grains housed in an attractive wooden storage box. The whetstone combines two different sides grits for adjusting and blade maintenance -- F1000/J3000 Grit and F2000/J8000 Grit. Before each use, soak the whetstone in water for 10 minutes to remove any metal dust, and plan on using water continually throughout the process. Place on a flat surface and hold it steady and stable. Using gentle pressure, draw the edge of the blade over the stone at a 10 - 15 angle from the blade s base to tip, then repeat this motion for the other side of the blade. Repeat using the other side of the whetstone to refine the edge as desired. Knives that are well maintained may only require fine honing. The whetstone is put together using a very good bond and open-pore structure that ensures new particles are continually exposed during use. Utilization of the stone s entire surface while sharpening enables the stone to wear evenly over time. The Wüsthof Superfine Whetstone is intended for use with water only, and not for use with oil. The included wood storage box provides easy storage. The Wüsthof 8 Superfine Whetstone carries a lifetime guarantee.