This is an oil stone from Asahi Tora brand by Matsunaga Toishi Co., Ltd. ◆Shipping via Yu-Packet Post◆ Specifications: ・Brand: MATSUNAGA (Matsunaga Toishi Co., Ltd.) ・Series: SUN TIGER ・Grit: Unknown ・Application: Oil sharpening for kitchen knives, knives, carpentry tools, etc. *Use with dedicated oil, sewing machine oil, etc. ・Dimensions: 205mm x 50mm x 25mm ・Weight: Approximately 600g ★I found this and stored it while organizing my parents' warehouse. It's quite old, but it's unused. The box is slightly deteriorated. ★To reduce shipping costs, we will ship via Yu-Packet Post. We will use cushioning material and ship via post. ★If you prefer hand delivery instead of postal delivery, we can ship via Yu-Packet Plus for an additional 300 yen. Please contact us before purchasing. ★Why not try sharpening your blades with an oil stone? Thank you for viewing.