Dia-Flat Lapping Plate designed to easily flatten all conventional and waterstones in less time than other methods. Using the new revolutionary DMT® Diamond Hardcoat 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.