4 DIFFERENT SPECIFICATIONS: different degree of thickness and various grinding speed, the sharpening stone can be divided into four types: 3000, 6000, 8000 and 10000. choose one among four types to match up with your tools.NATURAL STONE: The sharpening plate comes from natural stone, which is glossy and durable in use. The metal lines that have been polished are proved to be very soft and smooth, thereby polishing something fine and exqui .DURABLE IN USE: The sharpening stone is tough and wear-resisting when using it to sharpen all kinds of tools. significantly, it can be used for a long period of time. The powder doesn't fall off and the stone is not easy to wear out.ADDITIONAL PURPOSE: Besides using it as a sole sharpening stone, it is compatible with professional knife sharpener. It can be well installed and fixed on the top of knife sharpener, so the polishing efficiency and accuracy have been greatly improved.MULTIPLE-USE: The whetstone sharpening kit has a wide range of application and it can be widely used in all sorts of kitchen and garden tools such as knives, scissors, chisels, shave knives, planes and tools.Material: colour:As shownPackage Contents: 4 x knife sharpener the above package content, products are not included.Note: shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.