Naniwa Professional (Chosera) Whetstone Sharpening Stone, 600 grit Wusthof Classic you can add a 220

you can add a 220 or 400 grit stone to speed up the initial edge cutting (or if you have a damaged knife which needs some serious grinding)

Includes the pictured wooden saya (sheath) with ebony pin

Forged from a single piece of chromium-molybdenum-vanadium blade steel (X50 Cr MoV 15)

and it resharpens more easily than most stainless steels

and you get the very useful and standard Japanese style petty (utility) knife shape

Naniwa Professional (Chosera) Whetstone Sharpening Stone, 600 grit Wusthof Classic you can add a 220Naniwa Chosera Coarse 600 Grit Japanese Whetstone Sharpening Stone, NO stand base, 20cmx7cm surface, 2cm thick. Made in Japan. This coarse stone is perfect for grinding a new edge on your knife, and for working out nicks or cracks or other imperfections in old used abused damaged knives. Use this grade only when you regular maintenance and finishing isn't doing the trick anymore. It's quite coarse and so will cut (remove metal) quite aggressively and