The Dia-Flat Lapping Plate is designed to easily flatten all conventional and waterstones faster than any other method. Using the new revolutionary DMT Diamond Hardcoat Technology, this lapping plate will outlast any other diamond coating on the market. With a consistent, aggressive diamond surface (120 micron / 120 mesh) and precision ground, hand certified flat to +/- 0.0005, the Dia-Flat assures rigid execution when flattening stones. It also features a greater surface area for ease of use, sized at 10" x 4" x 0.375". Complete with a durable construction that will provide years of consistent performance and reliable service, professionals rely on the superior quality and versatility of DMT products for proper tool maintenance. Made in the USA.