A handy 4-1/3-inch by 7/8-inch diamond sharpening stone with unique folding handles which close around the stone to form a protective storage sheath. Color coded green stone is extra-fine grit or 1200 mesh. Will quickly sharpen the toughest steel and even carbide knives and tools. Unique interrupted surface speeds sharpening by clearing away the metal particles removed from the tool edge thus enhancing the abrasive action of the diamond crystals. Surface also features an inch of uninterrupted diamond to sharpen very small cutting edges or pointed tools. Customer satisfaction guaranteed.