Norton Flattening Stone for Waterstones, 3/4" x 3" x 9" in plastic case
A low cost, easy-to-use flattening method for all grit sizes of Waterstones.  The coarse grit silicon carbide promotes maximum cutting while the diagonal grooves provide a channel for debris to be removed during the flattening process.  Engineered for superb flatness with a very hard bond, it producess an extremely flat result on all sizes of Waterstones.