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. 95 micron diamond (160 mesh) 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. 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.