EZE-LAP 121C 2-1/2 by 11-3/8 by 3/8 Coarse Diamond Stone Coarse diamond grit; 250 grit; for quick metal removal to quickly bring back an extremely dull edge or repair a damaged edge Guaranteed to be flat Longest lasting and most durable sharpening tools available Quick easy way to sharpen both cutlery and tools, the "professionals" choice Made in USA