Brand new, unused. This is a double-sided whetstone for home use. It's a convenient item that restores sharpness by sharpening blades on both sides! Size: Length: Approximately 150mm Width: Approximately 50mm Height: Approximately 25mm Material: Whetstone [Double-sided Whetstone] ・ Medium grit #320 (lighter color): For when wear is minimal or for finishing. ・ Coarse grit #120 (darker color): For when wear is heavy or for base grinding. ※ Due to the nature of the product, there may be slight chipping or scratches on the corners during the manufacturing process or storage, but there is no problem with use, so we appreciate your understanding. Blades, care, maintenance