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Quantity
1
The Naniwa Professional 400 grit stone is hardcore. It eats up steel so fast that it makes serious repairs & bevel-setting a dream. Naniwa Professional stones are harder than most, so they stay flat better and last much longer than chea...
Reviews
5.0
23 ratings
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Naniwa 400
Very good quality
J
Joël · February 23, 2026
Worth it
Best stone on the market for repairs
S
Stephen · January 2, 2026
Great stone
This is a great quality stone and is ideal to start your sharpening before moving on to 4000 or 1000.