Dia-Flat lapping plate with innovative DMT Diamond Hardcoat Technology for an exceptionally durable and even diamond surface. Certified precision of +/- 0.0005" for the highest accuracy when flattening sharpening stones. Available in two grits: 120 micron (120 mesh) and 95 micron (160 mesh). 10" (25 cm) length with 40 square inches of working surface – 50% larger than conventional lapping plates for efficient, fast work. Made in the USA, durable and valued by craftsmen and professionals worldwide., Weight: 4.0565056208 Pounds, Manufacturer: Acme United Corporation