Naniwa Professional (Chosera) Whetstone Sharpening Stone, 600 grit Wusthof Classic If you want a diamond

If you want a diamond sharpener

or if you're a professional doing cooking or cheese demos or service

This is also my favourite paring knife shape -- I like this "spear point" shape more than the "bird's beak" or straight-edge "sheep's foot" shapes

2cm total thickness

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

Naniwa Professional (Chosera) Whetstone Sharpening Stone, 600 grit Wusthof Classic If you want a diamondNaniwa 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