Item Type:Folding WhetstoneMaterial: ABS + DiamondColor: BlackFold Size: Approx.12.5x3x2.5cm/4.9x1.2x1.0inUnfold Length: Approx.22.6cm/8.9inWeight: Approx. 62.0g/2.2ozQuantity: 1PcsThickness: 600 Grit/400 Grit (double side) 1The sharpening speed of the diamond is faster than the traditional sharpening stone, durable structure can provide longterm stable performance. 2Combine rough grinding and fine grinding, first rough grinding and then fine grinding and polishing. 3Suitable for polishing of outdoor knives, home kitchen knives and garden tools, wide compatibility, fodable, easy to carry. 4400 grit is used to sharpen the blade, or to sharpen the thickness of the blunt blade quickly. 5The 600 grit is fine grinding, 98% of the sharpening work can be done with 600 grit grindstone.