The Norton flattening stone for waterstones is precisely level, with a hard bond, to maintain the flat surface of waterstones; coarse-grit silicon carbide gives it maximum cutting power, and diagonal g...

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The Norton flattening stone for waterstones is precisely level, with a hard bond, to maintain the flat surface of waterstones; coarse-grit silicon carbide gives it maximum cutting power, and diagonal grooves on one face provide channels for material removal. This flattening stone measures 3/4 x 9 x 3 inches (H x W x D), which makes it suitable for flattening any waterstone with lesser dimensions. (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.) The plastic case protects and stores the stone.

Flattening stones are abrasive rectangular blocks used to smooth the sharpening surfaces and flatten the depressions that repeated use wears in water-lubricated sharpening stones (waterstones), to prepare them for effective sharpening of knives or tools. Waterstones have a finer grit and softer bond than oilstones, and use water as the lubricant to develop a slurry, a thin paste of abrasive grains and water that removes metal with less pressure than oilstone requires. Because of these characteristics, waterstones wear concave with use, and should be flattened periodically for best performance.

Norton Abrasives manufactures sanding, grinding, and polishing abrasives, and has been located in the United States since 1885. Norton, now a brand of Saint-Gobain, meets ISO 9000 and 14001 certification for quality and environmental management standards.

What's in the Box?

  • Flattening stone
  • Plastic case
  • Instructions



  • Care and maintain your tool and knife sharpener waterstone with this essential Norton Abrasives flattening stone
  • This flattening stone is thoughtfully designed with diagonal grooves that provide channels for material to be removed from a whetstone during the flattening process
  • Stone is superbly flat and made from a very firm, coarse grit silicon carbide that promotes fast results on wet stones during the flattening process. Material is suitable for all whetstone grits
  • Flattening Stone is the ideal size at 3/4 x 9 x 3 inch (H x W x D) , suitable for any waterstone or wet stone
  • Flattening stone comes with a protective storage case and stone holder as well as instructions on how to best use this whetstone flattener
  • Care and maintain your tool and knife sharpener waterstone with this essential Norton Abrasives flattening stone
  • This flattening stone is thoughtfully designed with diagonal grooves that provide channels for material to be removed from a whetstone during the flattening process
  • Stone is superbly flat and made from a very firm, coarse grit silicon carbide that promotes fast results on wet stones during the flattening process. Material is suitable for all whetstone grits
  • Flattening Stone is the ideal size at 3/4 x 9 x 3 inch (H x W x D) , suitable for any waterstone or wet stone
  • Flattening stone comes with a protective storage case and stone holder as well as instructions on how to best use this whetstone flattener

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