DMT SO2C Flexi-Sharp 1 X 2" - Coarse Superior diamond sharpening stones Legendary quality Made in the USA Custom sharpening, honing, deburring solution Coarse diamond to transform a dull edge Sharpens knives faster than conventional stones with DMT's monocrystalline diamond surface No oil is needed-sharpen dry or with water Durable & flexible construction provides for customize use