Dia-Flat Lapping Plate designed to easily flatten all conventional and Waterstones in less time than other methods. Using the new revolutionary DMT Diamond Hard coat Technology- this lapping plate outlasts any other diamond coating in the market. With a consistent, aggressive diamond surface and precision ground, hand certified flat to +/- 0.0005”, the Dia-Flat assures rigid execution when flattening stones. Greater surface area for ease of use. Size: 10" x 4" x 0.375" Durable construction will provide years of consistent performance and reliable service. For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT products. Made in USA.