Description: DUAL SIDED SHARPENING - Made from grade corundum WIDE APPLICATION - Used for shaping and polishing kitchen, hunting or pocket knives, carving and gardening tools. WATER STONE- This stone is meant to be used with water, not oil. Simply soak stone for 5-10 minutes before use, and lubricate with additional water as needed when sharpening. No expensive sharpening/honing oil needed! Size: approx.18x6x3CM/7.08x2.36x1.18 inch, easy to use Specification: Material: corundum Size: 18.2x6x3cm/7.17x2.36x1.18inch Color: Multicolor Specification(Optional,as you choose): 1000/3000 Grit,1000/6000 Grit,240/1000 Grit,600/1500 Grit Package Includes: 1 Piece Doublesided Sharpener Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. 1. Soak the sharpening stone in water for 15 minutes, and add some salt water. 2. Grinding the knife according to the order of sharp grinding after rough grinding 3. The sharpening angle is preferably 15-30 degrees 4. When grinding the knife, it is not necessary to scrape the slurry and the effect of sharpening is better. 5. Repeated friction 6. Please wipe clean after use, put it in the shade and dry it.