Conbays Sincerely at Your Service: If you buy these products from us, you can no reason to return the products within 90 days; all products have one year warranty; or if you have any question, please feel free to contact us. How to Use it? Firmly hold onto the easy grip handle (left or right hand) and set the rubber base on a sturdy surface. Set the heel of the knife between the 6 sharpening blades. Apply pressure and draw it through the 6 blades. Repeat this step several times for effective results. Concentrate on the tip of the knife's cutting edge, as this part of the knife is likely blunter due to frequent use. Lastly for honing/smoothing the blade's cutting edge, apply less pressure when pulling the knife through the 6 high carbon steel washers.