Check the listing for details. Norton Flattening Stone With Case. Condition: New. Listed at 76.98 USD. NEW, Norton Flattening Stone With Case, 833914, 9" x 3" x 3/4" flattening stone, Quickly flattens and refreshes the face of waterstones, Coarse grit silicon carbide promotes maximum cutting, Diagonal grooves provide a path for material removal during the process, The softness of a waterstone allows it to quickly develop a fast cutting abrasive slurry. That’s a real plus for honing, but a negative when you start to develop shallow indentations and irregularities in the surface. Norton’s flattening stone, when rubbed across your waterstone’s surface, quickly flattens and refreshes the face. Its coarse grit silicon carbide promotes maximum cutting while the diagonal grooves provide a path for material removal during the process. Stone measures 9" x 3" x 3/4" and includes a plastic case for.