Naniwa Super Stone coarse 400 Grit Japanese Whetstone Sharpening Stone, NO Stand, 21cm x 7cm surface, 2cm thick.
NOTE: This is a full 2cm thick stone. It has been brought to our attention that other vendors are importing the cheaper 1cm thick version and then not always specifying the thickness on their web sites. Those stones are cheaper, and being half as thick will be more prone to breaking and will not last nearly as long as these normal full-thickness stones! We do NOT and have never imported or sold those cheaper 1cm thick versions of these stones.
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 quickly.
Note: these are now branded "Super Stones" again... in 2015 Naniwa re-branded them "Sharpening Stones" for the North American market, but I think they finally realized that didn't make sense so they're gone back to the better-known "Super Stone" name.
These are excellent stones! High quality, long-lasting, great value, not fragile.
Warranty: One-year warranty against manufacturing defects.