Item Type: Whetstone Material: Natural White Jade Gross Weight: 425g / 15.0oz Product Size: Approx.20 x 5 x 1.2cm / 7.9 x 2.0 x 0.5in 1?��Long Lasting Sharpness: This sharpening stone is very convenient and practical, just use it once for long lasting sharpness, the perfect sharpener. 2?��Applicable: This whetstone sharpening set is suitable for household kitchen knife sets, professional chef's knives, scissors, chisels and axes or other tools that require sharpening. 3?��Safe: Grinding only requires water, easy to clean, guarantee food safe and delicious, and can be used with confidence. 4?��Easy to Operate: The beginner can easily set the knife at the correct sharpening angle, easy to use, making everything very easy, complete sharpening stone kit can meet all your sharpening needs. 5?��Widely Used: This knife grindstone is widely used in knives, scissors, hand tools, woodworking tools, carving tools, etc.