Make sure you have a good sharpener for your multi award-winning knives. This clever sharpener brings your GLOBAL knives back to their excellent, original condition. Pour water in the reservoir/wheel compartment to rinse the revolving ceramic whetstones and to prevent overheating the knife blade. Then, take the knife through each set of wheels (course, medium and fine - approx. 6 – 8 times each). Your knife will be ready to slice and dice like the first time you held it. Detailed instructions included.