The Norton Flattening Stone for Waterstones, was developed by Norton to address the tendency of all waterstones to wear concave with use. With the Flattening Stone, they can they can re-flattened as needed.
The course grit silicon carbide promotes maximum cutting, while the diagonal groves provide a swarf removal exit during the process. Engineered for superb flatness with a very hard bond, it produces an extremely flat result on all sizes of waterstones. For best results, bring the waterstone to the flattening stone.
Dimensions: 9" x 3" x 3/4".