【 SAI -】 Diamond Sharpener Size: See photo ⑧ Compact size Body: ABS resin Non-slip: Silicone rubber Whetstone: Industrial Diamond Heat resistance: 80℃ Made in Japan Diamond whetstone specifications Easily sharpens various types of knives, such as stainless steel, steel, and ceramic. Instructions for use are written on the outer box. See photos ⑥ and ⑦ There is no instruction manual from the time of purchase. Manufacturer's suggested retail price: 3080 yen Brand new, unused item. Shipped via Takkyubin Compact (Anonymous shipping)