2-Sage Knife Sharpener Diamond and Ceramic sharpening material Description: 1. Diamond and Ceramic sharpening material, best for you kitchen knives, chef's knives, fruit knives, etc. 2. 2-Stage, coarse grinding and fine honing/polishing make your blunt blade become sharpe and brilliant! 3. Wheel design for sharpening Back and Forth, faster and faster! 4. Non-slip base ensures the safety when sharpening. Usage: To begin with, place the knife sharpener plainly. 1. Coarse grinding: for a blunter knife Place the blunter knife into the Diamond sharpening slot, sharpening back and forth with a moderate pressure will lead to the best sharpening result. 2. Fine honing/polishing: for knife maitenance After coarse grinding, place the knife into the Ceramic sharpening slot, also sharpening back and forth. A necessary step for knife maitenace, so sharpening approximately once a week is recommended. 3. Cleaning After sharpening, clean the knife with wiper or water, and knife sharpener with a soft brush or a damp cloth. Caution: 1. Never sharpen the serrated blades and scissors to avoid damaging the knife sharpener. 2. To avoid any accidents, the knife sharpener should be away from children.